How to use parseForExpression method in Playwright Internal

Best JavaScript code snippet using playwright-internal

x-for.js

Source:x-for.js Github

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...6import { mutateDom } from '../mutation'7import { flushJobs } from '../scheduler'8import { warn } from '../utils/warn'9directive('for', (el, { expression }, { effect, cleanup }) => {10 let iteratorNames = parseForExpression(expression)11 let evaluateItems = evaluateLater(el, iteratorNames.items)12 let evaluateKey = evaluateLater(el,13 // the x-bind:key expression is stored for our use instead of evaluated.14 el._x_keyExpression || 'index'15 )16 el._x_prevKeys = []17 el._x_lookup = {}18 effect(() => loop(el, iteratorNames, evaluateItems, evaluateKey))19 cleanup(() => {20 Object.values(el._x_lookup).forEach(el => el.remove())21 delete el._x_prevKeys22 delete el._x_lookup23 })24})25let shouldFastRender = true26function loop(el, iteratorNames, evaluateItems, evaluateKey) {27 let isObject = i => typeof i === 'object' && ! Array.isArray(i)28 let templateEl = el29 evaluateItems(items => {30 // Prepare yourself. There's a lot going on here. Take heart,31 // every bit of complexity in this function was added for32 // the purpose of making Alpine fast with large datas.33 // Support number literals. Ex: x-for="i in 100"34 if (isNumeric(items) && items >= 0) {35 items = Array.from(Array(items).keys(), i => i + 1)36 }37 if (items === undefined) items = []38 let lookup = el._x_lookup39 let prevKeys = el._x_prevKeys40 let scopes = []41 let keys = []42 // In order to preserve DOM elements (move instead of replace)43 // we need to generate all the keys for every iteration up44 // front. These will be our source of truth for diffing.45 if (isObject(items)) {46 items = Object.entries(items).map(([key, value]) => {47 let scope = getIterationScopeVariables(iteratorNames, value, key, items)48 evaluateKey(value => keys.push(value), { scope: { index: key, ...scope} })49 scopes.push(scope)50 })51 } else {52 for (let i = 0; i < items.length; i++) {53 let scope = getIterationScopeVariables(iteratorNames, items[i], i, items)54 evaluateKey(value => keys.push(value), { scope: { index: i, ...scope} })55 scopes.push(scope)56 }57 }58 // Rather than making DOM manipulations inside one large loop, we'll59 // instead track which mutations need to be made in the following60 // arrays. After we're finished, we can batch them at the end.61 let adds = []62 let moves = []63 let removes = []64 let sames = []65 // First, we track elements that will need to be removed.66 for (let i = 0; i < prevKeys.length; i++) {67 let key = prevKeys[i]68 if (keys.indexOf(key) === -1) removes.push(key)69 }70 // Notice we're mutating prevKeys as we go. This makes it71 // so that we can efficiently make incremental comparisons.72 prevKeys = prevKeys.filter(key => ! removes.includes(key))73 let lastKey = 'template'74 // This is the important part of the diffing algo. Identifying75 // which keys (future DOM elements) are new, which ones have76 // or haven't moved (noting where they moved to / from).77 for (let i = 0; i < keys.length; i++) {78 let key = keys[i]79 let prevIndex = prevKeys.indexOf(key)80 if (prevIndex === -1) {81 // New key found.82 prevKeys.splice(i, 0, key)83 adds.push([lastKey, i])84 } else if (prevIndex !== i) {85 // A key has moved.86 let keyInSpot = prevKeys.splice(i, 1)[0]87 let keyForSpot = prevKeys.splice(prevIndex - 1, 1)[0]88 prevKeys.splice(i, 0, keyForSpot)89 prevKeys.splice(prevIndex, 0, keyInSpot)90 moves.push([keyInSpot, keyForSpot])91 } else {92 // This key hasn't moved, but we'll still keep track93 // so that we can refresh it later on.94 sames.push(key)95 }96 lastKey = key97 }98 // Now that we've done the diffing work, we can apply the mutations99 // in batches for both separating types work and optimizing100 // for browser performance.101 // We'll remove all the nodes that need to be removed,102 // letting the mutation observer pick them up and103 // clean up any side effects they had.104 for (let i = 0; i < removes.length; i++) {105 let key = removes[i]106 lookup[key].remove()107 lookup[key] = null108 delete lookup[key]109 }110 // Here we'll move elements around, skipping111 // mutation observer triggers by using "mutateDom".112 for (let i = 0; i < moves.length; i++) {113 let [keyInSpot, keyForSpot] = moves[i]114 let elInSpot = lookup[keyInSpot]115 let elForSpot = lookup[keyForSpot]116 let marker = document.createElement('div')117 mutateDom(() => {118 elForSpot.after(marker)119 elInSpot.after(elForSpot)120 marker.before(elInSpot)121 marker.remove()122 })123 refreshScope(elForSpot, scopes[keys.indexOf(keyForSpot)])124 }125 // We can now create and add new elements.126 for (let i = 0; i < adds.length; i++) {127 let [lastKey, index] = adds[i]128 let lastEl = (lastKey === 'template') ? templateEl : lookup[lastKey]129 let scope = scopes[index]130 let key = keys[index]131 let clone = document.importNode(templateEl.content, true).firstElementChild132 addScopeToNode(clone, reactive(scope), templateEl)133 mutateDom(() => {134 lastEl.after(clone)135 initTree(clone)136 })137 if (typeof key === 'object') {138 warn('x-for key cannot be an object, it must be a string or an integer', templateEl)139 }140 lookup[key] = clone141 }142 // If an element hasn't changed, we still want to "refresh" the143 // data it depends on in case the data has changed in an144 // "unobservable" way.145 for (let i = 0; i < sames.length; i++) {146 refreshScope(lookup[sames[i]], scopes[keys.indexOf(sames[i])])147 }148 // Now we'll log the keys (and the order they're in) for comparing149 // against next time.150 templateEl._x_prevKeys = keys151 })152}153// This was taken from VueJS 2.* core. Thanks Vue!154function parseForExpression(expression) {155 let forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/156 let stripParensRE = /^\s*\(|\)\s*$/g157 let forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/158 let inMatch = expression.match(forAliasRE)159 if (! inMatch) return160 let res = {}161 res.items = inMatch[2].trim()162 let item = inMatch[1].replace(stripParensRE, '').trim()163 let iteratorMatch = item.match(forIteratorRE)164 if (iteratorMatch) {165 res.item = item.replace(forIteratorRE, '').trim()166 res.index = iteratorMatch[1].trim()167 if (iteratorMatch[2]) {168 res.collection = iteratorMatch[2].trim()...

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index.js

Source:index.js Github

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...200 }201 var postfix, prefix;202 var expression = js.replace(/^\w+\s*/, '');203 if (js.indexOf('each') === 0) {204 var o = parseForExpression(expression)205 if (!o.attr) return new Error("attribute not found for " + expression)206 o.as = o.as || '__val'207 var args = o.as + (o.index ? ',' + o.index : '')208 prefix = o.attr + '.forEach(function(' + args + '){';209 closes.push('})')210 } else if (js.indexOf('if') === 0) {211 prefix = 'if (' + expression + '){';212 closes.push('}')213 } else if (js.indexOf('elif') === 0) {214 prefix = '} else if (' + expression + '){';215 } else if (js.indexOf('else') === 0) {216 prefix = '} else {';217 }218 return prefix219}220// posts as post, i221function parseForExpression(str) {222 var parts = str.split(/,\s*/)223 var index = parts[1]224 parts = parts[0].split(/\s+as\s+/)225 return {226 index: index,227 attr: parts[0],228 as: parts[1]229 }230}231function parseFilters(js) {232 if (!/\s\|\s/.test(js)) return js233 var arr = js.split(/\s*\|\s*/)234 var res = arr[0]235 for (var i = 1; i < arr.length; i++) {...

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vFor.js

Source:vFor.js Github

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...11 if (!dir.exp) {12 context.onError(errors_1.createCompilerError(37, dir.loc));13 return;14 }15 var parseResult = parseForExpression(dir.exp, context);16 if (!parseResult) {17 context.onError(errors_1.createCompilerError(38, dir.loc));18 return;19 }20 var helper = context.helper, addIdentifiers = context.addIdentifiers, removeIdentifiers = context.removeIdentifiers, scopes = context.scopes;21 var source = parseResult.source, value = parseResult.value, key = parseResult.key, index = parseResult.index;22 var renderExp = ast_1.createCallExpression(helper(runtimeHelpers_1.RENDER_LIST), [source]);23 var keyProp = utils_1.findProp(node, "key");24 var fragmentFlag = keyProp25 ? shared_1.PatchFlags.KEYED_FRAGMENT26 : shared_1.PatchFlags.UNKEYED_FRAGMENT;27 var codegenNode = ast_1.createSequenceExpression([28 ast_1.createCallExpression(helper(runtimeHelpers_1.OPEN_BLOCK), ["false"]),29 ast_1.createCallExpression(helper(runtimeHelpers_1.CREATE_BLOCK), [30 helper(runtimeHelpers_1.FRAGMENT),31 "null",32 renderExp,33 fragmentFlag + (__DEV__ ? " /* " + shared_1.PatchFlagNames[fragmentFlag] + " */" : "")34 ])35 ]);36 context.replaceNode({37 type: 11,38 loc: dir.loc,39 source: source,40 valueAlias: value,41 keyAlias: key,42 objectIndexAlias: index,43 children: node.tagType === 3 ? node.children : [node],44 codegenNode: codegenNode45 });46 scopes.vFor++;47 if (!__BROWSER__ && context.prefixIdentifiers) {48 value && addIdentifiers(value);49 key && addIdentifiers(key);50 index && addIdentifiers(index);51 }52 return function () {53 scopes.vFor--;54 if (!__BROWSER__ && context.prefixIdentifiers) {55 value && removeIdentifiers(value);56 key && removeIdentifiers(key);57 index && removeIdentifiers(index);58 }59 var childBlock;60 var isTemplate = utils_1.isTemplateNode(node);61 var slotOutlet = utils_1.isSlotOutlet(node)62 ? node63 : isTemplate &&64 node.children.length === 1 &&65 utils_1.isSlotOutlet(node.children[0])66 ? node.children[0]67 : null;68 var keyProperty = keyProp69 ? ast_1.createObjectProperty("key", keyProp.type === 670 ? ast_1.createSimpleExpression(keyProp.value.content, true)71 : keyProp.exp)72 : null;73 if (slotOutlet) {74 childBlock = slotOutlet.codegenNode;75 if (isTemplate && keyProperty) {76 utils_1.injectProp(childBlock, keyProperty, context);77 }78 }79 else if (isTemplate) {80 childBlock = utils_1.createBlockExpression(ast_1.createCallExpression(helper(runtimeHelpers_1.CREATE_BLOCK), [81 helper(runtimeHelpers_1.FRAGMENT),82 keyProperty ? ast_1.createObjectExpression([keyProperty]) : "null",83 node.children84 ]), context);85 }86 else {87 var codegenNode_1 = node.codegenNode;88 if (codegenNode_1.callee === runtimeHelpers_1.WITH_DIRECTIVES) {89 codegenNode_1.arguments[0].callee = helper(runtimeHelpers_1.CREATE_BLOCK);90 }91 else {92 codegenNode_1.callee = helper(runtimeHelpers_1.CREATE_BLOCK);93 }94 childBlock = utils_1.createBlockExpression(codegenNode_1, context);95 }96 renderExp.arguments.push(ast_1.createFunctionExpression(createForLoopParams(parseResult), childBlock, true));97 };98});99var forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;100var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;101var stripParensRE = /^\(|\)$/g;102function parseForExpression(input, context) {103 var loc = input.loc;104 var exp = input.content;105 var inMatch = exp.match(forAliasRE);106 if (!inMatch)107 return;108 var LHS = inMatch[1], RHS = inMatch[2];109 var result = {110 source: createAliasExpression(loc, RHS.trim(), exp.indexOf(RHS, LHS.length)),111 value: undefined,112 key: undefined,113 index: undefined114 };115 if (!__BROWSER__ && context.prefixIdentifiers) {116 result.source = transformExpression_1.processExpression(result.source, context);...

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browser.js

Source:browser.js Github

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...177 }178 var prefix;179 var expression = js.replace(/^\w+\s*/, '');180 if (js.indexOf('each') === 0) {181 var o = parseForExpression(expression)182 if (!o.attr) return new Error("attribute not found for " + expression)183 o.as = o.as || '__val'184 var args = o.as + (o.index ? ',' + o.index : '')185 prefix = o.attr + '.forEach(function(' + args + '){';186 closes.push('})')187 } else if (js.indexOf('if') === 0) {188 prefix = 'if (' + expression + '){';189 closes.push('}')190 } else if (js.indexOf('elif') === 0) {191 prefix = '} else if (' + expression + '){';192 } else if (js.indexOf('else') === 0) {193 prefix = '} else {';194 }195 return prefix196}197// posts as post, i198function parseForExpression(str) {199 var parts = str.split(/,\s*/)200 var index = parts[1]201 parts = parts[0].split(/\s+as\s+/)202 return {203 index: index,204 attr: parts[0],205 as: parts[1]206 }207}208function parseFilters(js) {209 if (!/\s\|\s/.test(js)) return js210 var arr = js.split(/\s*\|\s*/)211 var res = arr[0]212 for (var i = 1; i < arr.length; i++) {...

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StringUtils.js

Source:StringUtils.js Github

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1/**2 * Convert a string from kebab-case to camelCase.3 * @param {String} text String to modify.4 * @returns {String} Converted string.5 */6export const kebabToCamel = (text) => {7 return text.replace(/-(\w)/g, (match, character) => character.toUpperCase())8}9/**10 * Parse list of modifiers to an object.11 * - [ 'hello', 'there-100', 'general-kenobi' ]12 * -> { 'hello': true, 'there': 100, 'general': 'kenobi' }13 * @param {Array<String>} modifiers List of modifiers to parse.14 * @returns {Object} Parsed modifiers.15 */16export const parseAttributeModifiers = (modifiers) => {17 const result = {}18 for (const modifier of modifiers) {19 // Get index of hyphen.20 const hyphenIndex = modifier.indexOf('-')21 // If no hyphen then set the modifiers to true.22 if (hyphenIndex < 0) {23 result[modifier] = true24 continue25 }26 // If it starts with hyphen then set the modifier to false.27 if (hyphenIndex === 0) {28 result[modifier.substring(1)] = false29 continue30 }31 // If the hyphen is somewhere in the modifier then assume it is used as a split character.32 const key = modifier.substring(0, hyphenIndex)33 let value = modifier.substring(hyphenIndex + 1)34 let tmpValue = value35 // Try to remove time suffixes.36 let type37 if (value.endsWith('ms')) {38 tmpValue = value.substring(-2)39 } else if (value.endsWith('s')) {40 type = 's'41 tmpValue = value.substring(-1)42 } else if (value.endsWith('m')) {43 type = 'm'44 tmpValue = value.substring(-1)45 } else if (value.endsWith('h')) {46 type = 'h'47 tmpValue = value.substring(-1)48 }49 // Try to parse the value as a number.50 tmpValue = Number.parseInt(tmpValue)51 if (!isNaN(tmpValue)) {52 value = tmpValue53 // Convert to milliseconds if given in a different format.54 switch (type) {55 case 'h':56 value *= 6057 case 'm':58 value *= 6059 case 's':60 value *= 100061 break62 }63 }64 // Store modifier data.65 result[key] = value66 }67 return result68}69/**70 * Parse attribute name to list of segments.71 * Valid formats are:72 * - "d-directive"73 * -> [ 'directive', null, null, null ]74 * - "d-directive:key"75 * -> [ 'directive', 'key', 'key', null ]76 * - "d-directive:key-name"77 * -> [ 'directive', 'key-name', 'keyName', null ]78 * - "d-directive:key-name.modifiers"79 * -> [ 'directive', 'key-name', 'keyName', [ 'modifiers' ] ]80 * - "d-directive.modifiers.multiple"81 * -> [ 'directive', null, null, [ 'modifiers', 'multiple' ] ]82 * @param {String} name Name to parse.83 * @returns {Array<String>} list of segments.84 */85export const parseAttributeName = (prefix, name) => {86 // Match with expression.87 name = name.match(new RegExp('^' + prefix + '-([a-z][0-9a-z-]{1,}):?([a-z][0-9a-z-]*)?(\\..*]*)?$', 'i'))88 if (!name) {89 return90 }91 // Deconstruct match.92 let [full, directive, keyRaw, modifiers] = name // eslint-disable-line no-unused-vars93 // If no key provided set it to null instead of empty.94 keyRaw = keyRaw !== '' ? keyRaw : null95 const key = keyRaw ? kebabToCamel(keyRaw) : null96 // Ensure modifiers is and array.97 modifiers = modifiers ? modifiers.substring(1).split('.') : []98 // Return result a single array.99 return [directive, keyRaw, key, modifiers]100}101/**102 * Parses for expression. Valid expression formats are:103 * - "index of 4"104 * -> { iterable: "4", variables: [ "index" ] }105 * - "item of items"106 * -> { iterable: "items", variables: [ "item" ] }107 * - "key in object"108 * -> { iterable: "object", variables: [ "key" ] }109 * - "(key, value) in object"110 * -> { iterable: "object", variables: [ "key", "value" ] }111 * - "(key, value, index) in object"112 * -> { iterable: "object", variables: [ "key", "value", "index" ] }113 * - "(key, , index) in object"114 * -> { iterable: "object", variables: [ "key", undefined, "index" ] }115 */116export const parseForExpression = (expression) => {117 // Split variables from items expression.118 const match = expression.match(/^([$_a-z0-9,(){}\s]{1,}?)\s+(?:in|of)\s+([\s\S]{1,})$/i)119 if (!match) {120 return121 }122 // Remove parenthesis.123 let variables = match[1].replace(/^[\s({]*|[)}\s]*$/g, '')124 // Parse for variables.125 variables = variables.match(/^([$_a-z0-9]{1,})?(?:,\s+?)?([$_a-z0-9]{1,})?(?:,\s+)?([$_a-z0-9]{1,})?$/i)126 if (!variables) {127 return128 }129 variables.shift()130 return {131 iterable: match[2].trim(),132 variables: [...variables], // Convert it to an array instead of a regular expression match.133 }134}135/**136 * Parse selector to an attributes object.137 * @param {String} selector Selector to parse.138 * @returns {Object} Attributes. Do note the class property is a list of strings not a single string.139 */140export const parseSelector = (selector) => {141 // Convert to array.142 if (typeof (selector) === 'string') {143 selector = selector.split(/(?=\.)|(?=#)|(?=\[)/)144 }145 if (!Array.isArray(selector)) {146 console.error('Doars: parseSelector expects Array of string or a single string.')147 return148 }149 const attributes = {}150 for (let selectorSegment of selector) {151 // Trim spaces.152 selectorSegment = selectorSegment.trim()153 // Base what to do of the leading character.154 switch (selectorSegment[0]) {155 case '#':156 // Remove leading character and store as id.157 attributes.id = selectorSegment.substring(1)158 break159 case '.':160 // Remove leading character.161 selectorSegment = selectorSegment.substring(1)162 // Add to classlist.163 if (!attributes.class) {164 attributes.class = []165 }166 if (!attributes.class.includes(selectorSegment)) {167 attributes.class.push(selectorSegment)168 }169 break170 case '[':171 // Remove brackets and split key from value.172 const [full, key, value] = selectorSegment.match(/^(?:\[)?([-$_.a-z0-9]{1,})(?:[$*^])?(?:=)?([\s\S]{0,})(?:\])$/i) // eslint-disable-line no-unused-vars173 // Store attribute value in results.174 attributes[key] = value175 break176 }177 }178 return attributes179}180export default {181 kebabToCamel: kebabToCamel,182 parseAttributeModifiers: parseAttributeModifiers,183 parseAttributeName: parseAttributeName,184 parseForExpression: parseForExpression,185 parseSelector: parseSelector,...

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for.js

Source:for.js Github

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1import { transitionIn, transitionOut, getXAttrs, warnIfMalformedTemplate, isNumeric } from '../utils'2export function handleForDirective(component, templateEl, expression, initialUpdate, extraVars) {3 warnIfMalformedTemplate(templateEl, 'x-for')4 let iteratorNames = typeof expression === 'function'5 ? parseForExpression(component.evaluateReturnExpression(templateEl, expression))6 : parseForExpression(expression)7 let items = evaluateItemsAndReturnEmptyIfXIfIsPresentAndFalseOnElement(component, templateEl, iteratorNames, extraVars)8 // As we walk the array, we'll also walk the DOM (updating/creating as we go).9 let currentEl = templateEl10 items.forEach((item, index) => {11 let iterationScopeVariables = getIterationScopeVariables(iteratorNames, item, index, items, extraVars())12 let currentKey = generateKeyForIteration(component, templateEl, index, iterationScopeVariables)13 let nextEl = lookAheadForMatchingKeyedElementAndMoveItIfFound(currentEl.nextElementSibling, currentKey)14 // If we haven't found a matching key, insert the element at the current position.15 if (! nextEl) {16 nextEl = addElementInLoopAfterCurrentEl(templateEl, currentEl)17 // And transition it in if it's not the first page load.18 transitionIn(nextEl, () => {}, () => {}, component, initialUpdate)19 nextEl.__x_for = iterationScopeVariables20 component.initializeElements(nextEl, () => nextEl.__x_for)21 // Otherwise update the element we found.22 } else {23 // Temporarily remove the key indicator to allow the normal "updateElements" to work.24 delete nextEl.__x_for_key25 nextEl.__x_for = iterationScopeVariables26 component.updateElements(nextEl, () => nextEl.__x_for)27 }28 currentEl = nextEl29 currentEl.__x_for_key = currentKey30 })31 removeAnyLeftOverElementsFromPreviousUpdate(currentEl, component)32}33// This was taken from VueJS 2.* core. Thanks Vue!34function parseForExpression(expression) {35 let forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/36 let stripParensRE = /^\(|\)$/g37 let forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/38 let inMatch = String(expression).match(forAliasRE)39 if (! inMatch) return40 let res = {}41 res.items = inMatch[2].trim()42 let item = inMatch[1].trim().replace(stripParensRE, '')43 let iteratorMatch = item.match(forIteratorRE)44 if (iteratorMatch) {45 res.item = item.replace(forIteratorRE, '').trim()46 res.index = iteratorMatch[1].trim()47 if (iteratorMatch[2]) {48 res.collection = iteratorMatch[2].trim()...

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systemDirectives.js

Source:systemDirectives.js Github

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...97function parseDir(directive) {98 if (!directive) return {};99 let { name, attrValue } = directive;100 if (name === 'for') {101 return parseForExpression(attrValue);102 }103 return { value: attrValue };104}105function modelArgEq(n1, n2) {106 return n1 === n2 || ( !n1 && n2 === 'modelValue' ) || ( n1 === 'modelValue' && !n2 );107}108export function createSimpleObj(dir) {109 let { value, index, source } = dir.data;110 let name = `v-${ dir.name }`;111 if (name === 'v-for') {112 value = `(${ value }${ index && ` , ${ index }` }) in ${ source }`;113 }114 if (dir.arg) {115 name += ':' + dir.arg;116 }117 return {118 name,119 value,120 };121}122export function getDirectives(models, props) {123 let dirs =124 models &&125 models.map((model) => {126 let prop = props.find((dir) => dir.name == 'model' && modelArgEq(dir.getArgContent(), model));127 return Object.assign(128 {129 arg: model,130 enable: prop != null,131 data: parseDir(prop),132 },133 modelSchema,134 );135 });136 dirs = dirs || [];137 return dirs.concat(138 schemas.map((schema) => {139 let prop = props.find((dir) => dir.name == schema.name);140 return Object.assign({ enable: prop != null, data: parseDir(prop) }, schema);141 }),142 );143}144const forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;145const forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;146const stripParensRE = /^\(|\)$/g;147function parseForExpression(exp) {148 const inMatch = exp.match(forAliasRE);149 if (!inMatch) return;150 const [, LHS, RHS] = inMatch;151 const result = {152 source: RHS.trim(),153 value: undefined,154 key: undefined,155 index: undefined,156 };157 let valueContent = LHS.trim().replace(stripParensRE, '').trim();158 const iteratorMatch = valueContent.match(forIteratorRE);159 if (iteratorMatch) {160 valueContent = valueContent.replace(forIteratorRE, '').trim();161 const keyContent = iteratorMatch[1].trim();...

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alpine-emerge.esm.js

Source:alpine-emerge.esm.js Github

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...16 }17 });18 });19 } else if (cid && value === "for") {20 const items = parseForExpression(expression).items;21 const evaluator = evaluateLater(items);22 effect(() => {23 evaluator((evaluated) => {24 if (typeof evaluated === "number" && evaluated > 0 || typeof evaluated === "object" && evaluated.length > 0) {25 resolve();26 }27 });28 });29 } else {30 resolve();31 }32 async function resolve() {33 if (cid) {34 await _D.emerge(cid, root, extra ? JSON.parse(extra) : void 0);35 }36 el.removeAttribute(`x-emerge:${value}`);37 setTimeout(() => el.setAttribute(`x-${value}`, expression));38 }39 });40 function parseForExpression(expression) {41 let forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;42 let stripParensRE = /^\s*\(|\)\s*$/g;43 let forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;44 let inMatch = expression.match(forAliasRE);45 if (!inMatch)46 return;47 let res = {};48 res.items = inMatch[2].trim();49 let item = inMatch[1].replace(stripParensRE, "").trim();50 let iteratorMatch = item.match(forIteratorRE);51 if (iteratorMatch) {52 res.item = item.replace(forIteratorRE, "").trim();53 res.index = iteratorMatch[1].trim();54 if (iteratorMatch[2]) {...

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Using AI Code Generation

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1const playwright = require('playwright');2const { parseForExpression } = require('playwright/lib/utils/selectorParser');3(async () => {4 const browser = await playwright['chromium'].launch();5 const context = await browser.newContext();6 const page = await context.newPage();7 const handle = await page.$(parseForExpression('css=div'));8 await handle.screenshot({ path: 'example.png' });9 await browser.close();10})();11const playwright = require('playwright');12const { parseForExpression } = require('playwright/lib/utils/selectorParser');13(async () => {14 const browser = await playwright['chromium'].launch();15 const context = await browser.newContext();16 const page = await context.newPage();17 await handle.screenshot({ path: 'example.png' });18 await browser.close();19})();20const playwright = require('playwright');21const { parseForExpression } = require('playwright/lib/utils/selectorParser');22(async () => {23 const browser = await playwright['chromium'].launch();24 const context = await browser.newContext();25 const page = await context.newPage();26 const handle = await page.$(parseForExpression('text=Playwright'));27 await handle.screenshot({ path: 'example.png' });28 await browser.close();29})();30const playwright = require('playwright');31const { parseForExpression } = require('playwright/lib/utils/selectorParser');32(async () => {33 const browser = await playwright['chromium'].launch();34 const context = await browser.newContext();35 const page = await context.newPage();36 const handle = await page.$(parseForExpression('text=Playwright', { exact: true }));37 await handle.screenshot({ path: 'example.png' });38 await browser.close();39})();

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Using AI Code Generation

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1const { parseForExpression } = require('playwright/lib/utils/selectorParser');2const { parseSelector } = require('playwright/lib/utils/selectorParser');3const { parseSelectorList } = require('playwright/lib/utils/selectorParser');4const { parseSelectorListAsArray } = require('playwright/lib/utils/selectorParser');5const { parseSelectorListAsArrayWithNesting } = require('playwright/lib/utils/selectorParser');6const { parseSelectorListWithNesting } = require('playwright/lib/utils/selectorParser');7const { parseSelectorWithNesting } = require('playwright/lib/utils/selectorParser');8const { parseText } = require('playwright/lib/utils/selectorParser');9const { parseTextAsArray } = require('playwright/lib/utils/selectorParser');10const { parseTextAsArrayWithNesting } = require('playwright/lib/utils/selectorParser');11const { parseTextWithNesting } = require('playwright/lib/utils/selectorParser');12const selector = "css=div#myDiv > span.mySpan";13const parsedSelector = parseSelector(selector);14console.log("parsedSelector: ", parsedSelector);15const selectorList = "css=div#myDiv > span.mySpan,css=div#myDiv > span.mySpan2";16const parsedSelectorList = parseSelectorList(selectorList);17console.log("parsedSelectorList: ", parsedSelectorList);18const selectorListWithNesting = "css=div#myDiv > span.mySpan,css=div#myDiv > span.mySpan2,css=div#myDiv > span.mySpan3,css=div#myDiv > span.mySpan4";19const parsedSelectorListWithNesting = parseSelectorListWithNesting(selectorListWithNesting);20console.log("parsedSelectorListWithNesting: ", parsedSelectorListWithNesting);21const selectorListAsArray = "css=div#myDiv > span.mySpan,css=div#myDiv > span.mySpan2";22const parsedSelectorListAsArray = parseSelectorListAsArray(selectorListAsArray);23console.log("parsedSelectorListAsArray: ", parsedSelectorListAsArray);

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Using AI Code Generation

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1const { parseForExpression } = require('playwright/lib/server/frames');2const parsedExpression = parseForExpression('element.textContent');3console.log(parsedExpression);4const { parseForExpression } = require('playwright/lib/server/frames');5const parsedExpression = parseForExpression('element.textContent');6console.log(parsedExpression);7const { parseForExpression } = require('playwright/lib/server/frames');8const parsedExpression = parseForExpression('element.textContent');9console.log(parsedExpression);10const { parseForExpression } = require('playwright/lib/server/frames');11const parsedExpression = parseForExpression('element.textContent');12console.log(parsedExpression);13const { parseForExpression } = require('playwright/lib/server/frames');14const parsedExpression = parseForExpression('element.textContent');15console.log(parsedExpression);16const { parseForExpression } = require('playwright/lib/server/frames');17const parsedExpression = parseForExpression('element.textContent');18console.log(parsedExpression);19const { parseForExpression } = require('playwright/lib/server/frames');20const parsedExpression = parseForExpression('element.textContent');21console.log(parsedExpression);22const { parseForExpression } = require('playwright/lib/server/frames');23const parsedExpression = parseForExpression('element.textContent');24console.log(parsedExpression);25const { parseForExpression } = require('playwright/lib/server/frames');26const parsedExpression = parseForExpression('element.textContent');27console.log(parsedExpression);28const { parseForExpression } = require('playwright/lib/server/frames');29const parsedExpression = parseForExpression('element.textContent');30console.log(parsedExpression);31const { parseForExpression } = require('playwright/lib/server/frames');32const parsedExpression = parseForExpression('element.textContent');33console.log(parsedExpression);

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Using AI Code Generation

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1const { parseForExpression } = require('playwright/lib/server/frames');2const { parse } = require('playwright/lib/server/common/utils');3const { parseExpression } = require('playwright/lib/server/common/javascript');4const input = "document.querySelector('div')";5const parsed = parseForExpression(input);6const expression = parsed.expression;7const isFunction = parsed.isFunction;8const parsedExpression = parseExpression(expression);9const parsedFunction = parse(`async function() { ${expression} }`);10const value = await page.evaluate(parsedFunction, ...parsedExpression.args);11console.log(value);12await page.type(input, value);13await page.click('button');14const value = await page.evaluate(parsedFunction, ...parsedExpression.args);15console.log(value);16await page.type(input, value);17await page.click('button');18const value = await page.evaluate(parsedFunction, ...parsedExpression.args);19console.log(value);20await page.type(input, value);21await page.click('button');22const value = await page.evaluate(parsedFunction, ...parsedExpression.args);23console.log(value);24await page.type(input, value);25await page.click('button');26const value = await page.evaluate(parsedFunction, ...parsedExpression.args);27console.log(value);28await page.type(input, value);29await page.click('button');

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Using AI Code Generation

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1const { parseForExpression } = require('playwright-core/lib/utils/selectorParser');2const selector = parseForExpression('text=Click me', 'css');3const { parseForExpression } = require('playwright-core/lib/utils/selectorParser');4const { chromium } = require('playwright-core');5const selector = parseForExpression('text=Click me', 'css');6(async () => {7 const browser = await chromium.launch({ headless: false });8 const context = await browser.newContext();9 const page = await context.newPage();10 await page.click(selector);11 await browser.close();12})();13In the above code, we have imported the

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Using AI Code Generation

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1const { parseForExpression } = require('playwright-core/lib/server/common/parseForExpression');2const expression = parseForExpression('myVar');3console.log(expression);4const { parseForExpression } = require('playwright-core/lib/server/common/parseForExpression');5const expression = parseForExpression('myVar');6console.log(expression);7const { parseForExpression } = require('playwright-core/lib/server/common/parseForExpression');8const expression = parseForExpression('myVar');9console.log(expression);10const { parseForExpression } = require('playwright-core/lib/server/common/parseForExpression');11const expression = parseForExpression('myVar');12console.log(expression);13const { parseForExpression } = require('playwright-core/lib/server/common/parseForExpression');14const expression = parseForExpression('myVar');15console.log(expression);16const { parseForExpression } = require('playwright-core/lib/server/common/parseForExpression');17const expression = parseForExpression('myVar');18console.log(expression);19const { parseForExpression } = require('playwright-core/lib/server/common/parseForExpression');20const expression = parseForExpression('myVar');21console.log(expression);22const { parseForExpression } = require('playwright-core/lib/server/common/parseForExpression');23const expression = parseForExpression('myVar');24console.log(expression);25const { parseForExpression } = require('playwright-core/lib/server/common/parseForExpression');26const expression = parseForExpression('myVar');27console.log(expression);28const { parseForExpression } = require('playwright

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Playwright tutorial

LambdaTest’s Playwright tutorial will give you a broader idea about the Playwright automation framework, its unique features, and use cases with examples to exceed your understanding of Playwright testing. This tutorial will give A to Z guidance, from installing the Playwright framework to some best practices and advanced concepts.

Chapters:

  1. What is Playwright : Playwright is comparatively new but has gained good popularity. Get to know some history of the Playwright with some interesting facts connected with it.
  2. How To Install Playwright : Learn in detail about what basic configuration and dependencies are required for installing Playwright and run a test. Get a step-by-step direction for installing the Playwright automation framework.
  3. Playwright Futuristic Features: Launched in 2020, Playwright gained huge popularity quickly because of some obliging features such as Playwright Test Generator and Inspector, Playwright Reporter, Playwright auto-waiting mechanism and etc. Read up on those features to master Playwright testing.
  4. What is Component Testing: Component testing in Playwright is a unique feature that allows a tester to test a single component of a web application without integrating them with other elements. Learn how to perform Component testing on the Playwright automation framework.
  5. Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
  6. Functions and Selectors in Playwright: Learn how to launch the Chromium browser with Playwright. Also, gain a better understanding of some important functions like “BrowserContext,” which allows you to run multiple browser sessions, and “newPage” which interacts with a page.
  7. Handling Alerts and Dropdowns in Playwright : Playwright interact with different types of alerts and pop-ups, such as simple, confirmation, and prompt, and different types of dropdowns, such as single selector and multi-selector get your hands-on with handling alerts and dropdown in Playright testing.
  8. Playwright vs Puppeteer: Get to know about the difference between two testing frameworks and how they are different than one another, which browsers they support, and what features they provide.
  9. Run Playwright Tests on LambdaTest: Playwright testing with LambdaTest leverages test performance to the utmost. You can run multiple Playwright tests in Parallel with the LammbdaTest test cloud. Get a step-by-step guide to run your Playwright test on the LambdaTest platform.
  10. Playwright Python Tutorial: Playwright automation framework support all major languages such as Python, JavaScript, TypeScript, .NET and etc. However, there are various advantages to Python end-to-end testing with Playwright because of its versatile utility. Get the hang of Playwright python testing with this chapter.
  11. Playwright End To End Testing Tutorial: Get your hands on with Playwright end-to-end testing and learn to use some exciting features such as TraceViewer, Debugging, Networking, Component testing, Visual testing, and many more.
  12. Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.

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