How to use globalHandleError method in Playwright Internal

Best JavaScript code snippet using playwright-internal

core-util.js

Source:core-util.js Github

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...118 try {119 const capture = hooks[i].call(cur, err, vm, info) === false120 if (capture) return121 } catch (e) {122 globalHandleError(e, cur, 'errorCaptured hook')123 }124 }125 }126 }127 }128 globalHandleError(err, vm, info)129}130描述：用于错误处理131参数：132{Error} err catch 到的错误对象，我们可以看到 Vue 源码中是这样使用的：133try {134 ...135} catch (e) {136 handleError(e, vm, `${hook} hook`)137}138* `{any} vm` 这里应该传递 `Vue` 实例139* `{String} info` `Vue` 特定的错误提示信息140源码分析141首先迎合一下使用场景，在 Vue 的源码中 handleError 函数的使用一般如下：142try {143 handlers[i].call(vm)144} catch (e) {145 handleError(e, vm, `${hook} hook`)146}147上面是生命周期钩子回调执行时的代码，由于生命周期钩子是开发者自定义的函数，这个函数的执行是很可能存在运行时错误的，所以这里需要 try catch 包裹，且在发生错误的时候，在 catch 语句块中捕获错误，然后使用 handleError 进行错误处理。知道了这些，我们再看看 handleError 到底怎么处理的，源码上面已经贴出来了，首先是一个 if 判断：148if (vm) {149 let cur = vm150 while ((cur = cur.$parent)) {151 if (cur.$options.errorCaptured) {152 try {153 const propagate = cur.$options.errorCaptured.call(cur, err, vm, info)154 if (!propagate) return155 } catch (e) {156 globalHandleError(e, cur, 'errorCaptured hook')157 }158 }159 }160}161那这段代码是干嘛的呢？我们先不管，回头来说。我们先看后面的代码，在判断语句后面直接调用了 globalHandleError 函数，且将三个参数透传了过去：162globalHandleError(err, vm, info)163globalHandleError 函数就定义在 handleError 函数的下面，源码如下：164function globalHandleError (err, vm, info) {165 if (config.errorHandler) {166 try {167 return config.errorHandler.call(null, err, vm, info)168 } catch (e) {169 logError(e, null, 'config.errorHandler')170 }171 }172 logError(err, vm, info)173}174globalHandleError 函数首先判断 config.errorHandler 是否为真，如果为真则调用 config.errorHandler 并将参数透传，这里的 config.errorHandler 就是 Vue 全局API提供的用于自定义错误处理的配置我们前面讲过。由于这个错误处理函数也是开发者自定义的，所以可能出现运行时错误，这个时候就需要使用 try catch 语句块包裹起来，当错误发生时，使用 logError 函数打印错误，当然啦，如果没有配置 config.errorHandler 也就是说 config.errorHandler 此时为假，那么将使用默认的错误处理函数，也就是 logError 进行错误处理。175所以 globalHandleError 是用来检测你是否自定义了 config.errorHandler 的，如果有则用之，如果没有就是用 logError。176那么 logError 是什么呢？这个函数定义在 globalHandleError 函数的下面，源码如下：177function logError (err, vm, info) {178 if (process.env.NODE_ENV !== 'production') {179 warn(`Error in ${info}: "${err.toString()}"`, vm)180 }181 /​* istanbul ignore else */​182 if ((inBrowser || inWeex) && typeof console !== 'undefined') {183 console.error(err)184 } else {185 throw err186 }187}188可以看到，在非生产环境下，先使用 warn 函数报一个警告，然后判断是否在浏览器或者Weex环境且 console 是否可用，如果可用则使用 console.error 打印错误，没有则直接 throw err。189所以 logError 才真正打印错误的函数，且实现也比较简单。这其实已经达到了 handleError 的目的了，但是大家注意我们此时忽略了一段代码，就是 handleError 函数开头的一段代码：190if (vm) {191 let cur = vm192 while ((cur = cur.$parent)) {193 const hooks = cur.$options.errorCaptured194 if (hooks) {195 for (let i = 0; i < hooks.length; i++) {196 try {197 const capture = hooks[i].call(cur, err, vm, info) === false198 if (capture) return199 } catch (e) {200 globalHandleError(e, cur, 'errorCaptured hook')201 }202 }203 }204 }205}206那么这个 if 判断是干嘛的呢？这其实是 Vue 选项 errorCaptured 的实现。实际上我们可以这样写代码：207var vm = new Vue({208 errorCaptured: function (err, vm, info) {209 console.log(err)210 console.log(vm)211 console.log(info)212 }213})214errorCaptured 选项可以用来捕获子代组件的错误，当子组件有错误被 handleError 函数处理时，父组件可以通过该选项捕获错误。这个选项与生命周期钩子并列。215举一个例子，如下代码：216var ChildComponent = {217 template: '<div>child component</​div>',218 beforeCreate: function () {219 JSON.parse("};")220 }221}222var vm = new Vue({223 components: {224 ChildComponent225 },226 errorCaptured: function (err, vm, info) {227 console.log(err)228 console.log(vm)229 console.log(info)230 }231})232上面的代码中，首先我们定义了一个子组件 ChildComponent，并且在 ChildComponent 的 beforeCreate 钩子中写了如下代码：233JSON.parse("};")234这明显会报错嘛，然后我们在父组件中使用了 errorCaptured 选项，这样是可以捕获到错误的。235接下来我们就看看 Vue 是怎么实现的，原理就在这段代码中：236if (vm) {237 let cur = vm238 while ((cur = cur.$parent)) {239 const hooks = cur.$options.errorCaptured240 if (hooks) {241 for (let i = 0; i < hooks.length; i++) {242 try {243 const capture = hooks[i].call(cur, err, vm, info) === false244 if (capture) return245 } catch (e) {246 globalHandleError(e, cur, 'errorCaptured hook')247 }248 }249 }250 }251}252首先看这个 while 循环：253while ((cur = cur.$parent))254这是一个链表遍历嘛，逐层寻找父级组件，如果父级组件使用了 errorCaptured 选项，则调用之，就怎么简单。当然啦，作为生命周期钩子，errorCaptured 选项在内部时以一个数组的形式存在的，所以需要 for 循环遍历，另外钩子执行的语句是被包裹在 try catch 语句块中的。255这里有两点需要注意：256第一、既然是逐层寻找父级，那意味着，如果一个子组件报错，那么其使用了 errorCaptured 的所有父代组件都可以捕获得到。257第二、注意这句话：258if (capture) return259其中 capture 是钩子调用的返回值与 false 的全等比较的结果，也就是说，如果 errorCaptured 钩子函数返回假，那么 capture 为真直接 return，程序不会走 if 语句块后面的 globalHandleError，否则除了 errorCaptured 被调用外，if 语句块后面的 globalHandleError 也会被调用。最总要的是：如果 errorCaptured 钩子函数返回假将阻止错误继续向“上级”传递。260lang.js 文件代码说明...

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index.js

Source:index.js Github

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...14 try {15 const capture = hooks[i].call(cur, err, vm, info) === false16 if (capture) return17 } catch (e) {18 globalHandleError(e, cur, 'errorCaptured hook')19 }20 }21 }22 }23 }24 globalHandleError(err, vm, info)25}26function globalHandleError(err, vm, info) {27 if (config.errorHandler) {28 try {29 return config.errorHandler.call(null, err, vm, info)30 } catch (e) {31 logError(e, null, 'config.errorHandler')32 }33 }34 logError(err, vm, info)35}36function logError(err, vm, info) {37 if (process.env.NODE_ENV !== 'production') {38 console.log(`Error in ${info}: "${err.toString()}"`, vm)39 }40 /​* istanbul ignore else */​...

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error.js

Source:error.js Github

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...12 try {13 const capture = hooks[i].call(cur, err, vm, info) === false14 if (capture) return15 } catch (e) {16 globalHandleError(e, cur, 'errorCaptured hook')17 }18 }19 }20 }21 }22 globalHandleError(err, vm, info)23}24function globalHandleError (err, vm, info) {25 if (config.errorHandler) {26 try {27 return config.errorHandler.call(null, err, vm, info)28 } catch (e) {29 logError(e, null, 'config.errorHandler')30 }31 }32 logError(err, vm, info)33}34function logError (err, vm, info) {35 if (process.env.NODE_ENV !== 'production') {36 warn(`Error in ${info}: "${err.toString()}"`, vm)...

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Using AI Code Generation

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1const { internal } = require('playwright');2const { globalHandleError } = internal;3const { internal } = require('playwright');4const { globalHandleError } = internal;5globalHandleError('Error message', 'Error stack trace');6const { internal } = require('playwright');7const { globalHandleError } = internal;8globalHandleError('Error message', 'Error stack trace');9const { internal } = require('playwright');10const { globalHandleError } = internal;11globalHandleError('Error message', 'Error stack trace');12const { internal } = require('playwright');13const { globalHandleError } = internal;14globalHandleError('Error message', 'Error stack trace');15const { internal } = require('playwright');16const { globalHandleError } = internal;17globalHandleError('Error message', 'Error stack trace');18const { internal } = require('playwright');19const { globalHandleError } = internal;20globalHandleError('Error message', 'Error stack trace');21const { internal } = require('playwright');22const { globalHandleError } = internal;23globalHandleError('Error message', 'Error stack trace');24const { internal } = require('playwright');25const { globalHandleError } = internal;26globalHandleError('Error message', 'Error stack trace');27const { internal } = require('playwright');28const { globalHandleError } = internal;29globalHandleError('Error message', 'Error stack trace');30const { internal } = require('playwright');31const { globalHandleError }

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Using AI Code Generation

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1const { globalHandleError } = require('@playwright/​test/​lib/​utils/​stackTrace');2const { InternalError } = require('@playwright/​test/​lib/​utils/​errors');3try {4} catch (error) {5 globalHandleError(new InternalError(error));6}7expect(true).toBe(false);

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Using AI Code Generation

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1const { globalHandleError } = require('playwright/​lib/​utils/​utils');2const { expect } = require('chai');3const { chromium } = require('playwright');4describe('Playwright Test', () => {5 let browser;6 let context;7 let page;8 before(async () => {9 browser = await chromium.launch();10 });11 after(async () => {12 await browser.close();13 });14 beforeEach(async () => {15 context = await browser.newContext();16 page = await context.newPage();17 });18 afterEach(async () => {19 await page.close();20 await context.close();21 });22 it('should throw error', async () => {23 await page.click('text=Register');24 await page.click('text=Register');25 });26});

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Using AI Code Generation

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1const { InternalError } = require('playwright/​lib/​server/​errors');2InternalError.globalHandleError = function (error) {3 console.log('Global Error Handler');4 console.log(error);5};6const { InternalError } = require('playwright/​lib/​server/​errors');7InternalError.globalHandleError = function (error) {8 console.log('Global Error Handler');9 console.log(error);10};11const { InternalError } = require('playwright/​lib/​server/​errors');12InternalError.globalHandleError = function (error) {13 console.log('Global Error Handler');14 console.log(error);15};16const { InternalError } = require('playwright/​lib/​server/​errors');17InternalError.globalHandleError = function (error) {18 console.log('Global Error Handler');19 console.log(error);20};21const { InternalError } = require('playwright/​lib/​server/​errors');22InternalError.globalHandleError = function (error) {23 console.log('Global Error Handler');24 console.log(error);25};26const { InternalError } = require('playwright/​lib/​server/​errors');27InternalError.globalHandleError = function (error) {28 console.log('Global Error Handler');29 console.log(error);30};31const { InternalError } = require('playwright/​lib/​server/​errors');32InternalError.globalHandleError = function (error) {33 console.log('Global Error Handler');34 console.log(error);35};36const { InternalError } = require('playwright/​lib/​server/​errors');37InternalError.globalHandleError = function (error) {38 console.log('Global Error Handler');39 console.log(error);40};41const { InternalError } = require('playwright/​lib/​server/​errors');42InternalError.globalHandleError = function (error) {43 console.log('Global Error Handler');44 console.log(error);45};46const { InternalError } = require('playwright

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Using AI Code Generation

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1const { globalHandleError } = require('playwright-core/​lib/​helper');2const { chromium } = require('playwright-core');3(async () => {4 const browser = await chromium.launch();5 const page = await browser.newPage();6 await page.evaluate(() => {7 throw new Error('oops');8 });9 await browser.close();10 globalHandleError(new Error('oops'));11})();12 at ExecutionContext._evaluateInternal (C:\Users\username\playwright\playwright\lib\server\chromium\chromium.js:1026:19)13 at processTicksAndRejections (internal/​process/​task_queues.js:93:5)14 at async ExecutionContext.evaluate (C:\Users\username\playwright\playwright\lib\server\chromium\chromium.js:1017:16)15const { globalHandleError } = require('playwright-core/​lib/​helper');16const { chromium } = require('playwright-core');17(async () => {18 const browser = await chromium.launch();19 const page = await browser.newPage();20 try {21 await page.evaluate(() => {22 throw new Error('oops');23 });24 } catch (error) {25 console.log(error);26 }27 await browser.close();

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Using AI Code Generation

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1const { InternalError } = require('playwright/​lib/​server/​errors');2InternalError.globalHandleError = function (error) {3 console.log('Error handled globally');4};5const { TimeoutError } = require('playwright/​lib/​server/​errors');6TimeoutError.globalHandleError = function (error) {7 console.log('TimeoutError handled globally');8};9const { Error } = require('playwright/​lib/​server/​errors');10Error.globalHandleError = function (error) {11 console.log('Error handled globally');12};13const { Error } = require('playwright/​lib/​server/​errors');14Error.globalHandleError = function (error) {15 console.log('Error handled globally');16};17const { TimeoutError } = require('playwright/​lib/​server/​errors');18TimeoutError.globalHandleError = function (error) {19 console.log('TimeoutError handled globally');20};21const { Error } = require('playwright/​lib/​server/​errors');22Error.globalHandleError = function (error) {23 console.log('Error handled globally');24};25const { InternalError } = require('playwright/​lib/​server/​errors');26InternalError.globalHandleError = function (error) {27 console.log('Error handled globally');28};29const { TimeoutError } = require('playwright/​lib/​server/​errors');30TimeoutError.globalHandleError = function (error) {31 console.log('TimeoutError handled globally');32};33const { Error } = require('playwright/​lib/​server/​errors');34Error.globalHandleError = function (error) {35 console.log('Error handled globally');36};37const { Error } = require('playwright/​lib/​server/​errors');38Error.globalHandleError = function (error) {39 console.log('Error handled globally');40};41const { TimeoutError } = require('playwright/​lib/​server

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Using AI Code Generation

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1const { globalHandleError } = require(“@playwright/​test”);2const { globalHandleError } = require(“@playwright/​test”);3const { globalHandleError } = require(“@playwright/​test”);4const { globalHandleError } = require(“@playwright/​test”);5const { globalHandleError } = require(“@playwright/​test”);6const { globalHandleError } = require(“@playwright/​test”);7const { globalHandleError } = require(“@playwright/​test”);8const { globalHandleError } = require(“@playwright/​test”);9const { globalHandleError } = require(“@playwright/​test”);10const { globalHandleError } = require(“@playwright/​test”);11const { globalHandleError } = require(“@playwright/​test”);12const { globalHandleError } = require(“@playwright/​test”);13const { globalHandleError } = require(“@playwright/​test”);14const { globalHandleError } = require(“@playwright/​test”);

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Using AI Code Generation

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1const { Playwright } = require('@playwright/​test');2Playwright._require('internal').globalHandleError = (error) => {3 console.log("Global Error Handler");4 console.log(error);5}6const { test } = require('@playwright/​test');7test.use({8 globalHandleError: (error) => {9 console.log("Global Error Handler");10 console.log(error);11 }12});13const { Runner } = require('@playwright/​test');14Runner.use({15 globalHandleError: (error) => {16 console.log("Global Error Handler");17 console.log(error);18 }19});20const { Reporter } = require('@playwright/​test');21Reporter.use({22 globalHandleError: (error) => {23 console.log("Global Error Handler");24 console.log(error);25 }26});27const { TestRunner } = require('@playwright/​test');28TestRunner.use({29 globalHandleError: (error) => {30 console.log("Global Error Handler");31 console.log(error);32 }33});34const { ReporterRunner } = require('@playwright/​test');35ReporterRunner.use({36 globalHandleError: (error) => {37 console.log("Global Error Handler");38 console.log(error);39 }40});41const { TestReporter } = require('@playwright/​test');42TestReporter.use({43 globalHandleError: (error) => {44 console.log("Global Error Handler");45 console.log(error);46 }47});48const { TestReporterRunner } = require('@playwright/​test');49TestReporterRunner.use({50 globalHandleError: (error) => {51 console.log("Global Error Handler");52 console.log(error);53 }54});55const { TestReporterRunner } = require('@playwright/​test');56TestReporterRunner.use({57 globalHandleError: (error) => {58 console.log("Global Error Handler");59 console.log(error);60 }61});

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