How to use Hint method of js Package

Best K6 code snippet using js.Hint

webview.go

Source:webview.go

...45func init() {46	// Ensure that main.main is called from the main thread47	runtime.LockOSThread()48}49// Hints are used to configure window sizing and resizing50type Hint int51const (52	// Width and height are default size53	HintNone = C.WEBVIEW_HINT_NONE54	// Window size can not be changed by a user55	HintFixed = C.WEBVIEW_HINT_FIXED56	// Width and height are minimum bounds57	HintMin = C.WEBVIEW_HINT_MIN58	// Width and height are maximum bounds59	HintMax = C.WEBVIEW_HINT_MAX60)61type WebView interface {62	// Run runs the main loop until it's terminated. After this function exits -63	// you must destroy the webview.64	Run()65	// Terminate stops the main loop. It is safe to call this function from66	// a background thread.67	Terminate()68	//show webview windows69	Show()70	//hide webview windows71	Hide()72	// Dispatch posts a function to be executed on the main thread. You normally73	// do not need to call this function, unless you want to tweak the native74	// window.75	Dispatch(f func())76	// Destroy destroys a webview and closes the native window.77	Destroy()78	// Window returns a native window handle pointer. When using GTK backend the79	// pointer is GtkWindow pointer, when using Cocoa backend the pointer is80	// NSWindow pointer, when using Win32 backend the pointer is HWND pointer.81	Window() unsafe.Pointer82	// SetTitle updates the title of the native window. Must be called from the UI83	// thread.84	SetTitle(title string)85	// SetSize updates native window size. See Hint constants.86	SetSize(w int, h int, hint Hint)87	// SetIcon.88	SetIcon(iconBytes []byte)89	// Navigate navigates webview to the given URL. URL may be a data URI, i.e.90	// "data:text/text,<html>...</html>". It is often ok not to url-encode it91	// properly, webview will re-encode it for you.92	Navigate(url string)93	// Init injects JavaScript code at the initialization of the new page. Every94	// time the webview will open a the new page - this initialization code will95	// be executed. It is guaranteed that code is executed before window.onload.96	Init(js string)97	// Eval evaluates arbitrary JavaScript code. Evaluation happens asynchronously,98	// also the result of the expression is ignored. Use RPC bindings if you want99	// to receive notifications about the results of the evaluation.100	Eval(js string)101	// Bind binds a callback function so that it will appear under the given name102	// as a global JavaScript function. Internally it uses webview_init().103	// Callback receives a request string and a user-provided argument pointer.104	// Request string is a JSON array of all the arguments passed to the105	// JavaScript function.106	//107	// f must be a function108	// f must return either value and error or just error109	Bind(name string, f interface{}) error110}111type webview struct {112	w C.webview_t113}114var (115	m        sync.Mutex116	index    uintptr117	dispatch = map[uintptr]func(){}118	bindings = map[uintptr]func(id, req string) (interface{}, error){}119)120func boolToInt(b bool) C.int {121	if b {122		return 1123	}124	return 0125}126// New calls NewWindow to create a new window and a new webview instance. If debug127// is non-zero - developer tools will be enabled (if the platform supports them).128func New(width int, height int, hide bool, debug bool) WebView {129	w := &webview{}130	w.w = C.webview_create(C.int(width), C.int(height), boolToInt(hide), boolToInt(debug))131	return w132}133func (w *webview) Destroy() {134	C.webview_destroy(w.w)135}136func (w *webview) Run() {137	C.webview_run(w.w)138}139func (w *webview) Terminate() {140	C.webview_terminate(w.w)141}142func (w *webview) Show() {143	C.webview_show(w.w)144}145func (w *webview) Hide() {146	C.webview_hide(w.w)147}148func (w *webview) Window() unsafe.Pointer {149	return C.webview_get_window(w.w)150}151func (w *webview) Navigate(url string) {152	s := C.CString(url)153	defer C.free(unsafe.Pointer(s))154	C.webview_navigate(w.w, s)155}156func (w *webview) SetTitle(title string) {157	s := C.CString(title)158	defer C.free(unsafe.Pointer(s))159	C.webview_set_title(w.w, s)160}161func (w *webview) SetSize(width int, height int, hint Hint) {162	C.webview_set_size(w.w, C.int(width), C.int(height), C.int(hint))163}164func (w *webview) SetIcon(iconBytes []byte) {165	C.webview_set_icon(w.w, unsafe.Pointer(&iconBytes[0]), C.int(len(iconBytes)))166}167func (w *webview) Init(js string) {168	s := C.CString(js)169	defer C.free(unsafe.Pointer(s))170	C.webview_init(w.w, s)171}172func (w *webview) Eval(js string) {173	s := C.CString(js)174	defer C.free(unsafe.Pointer(s))175	C.webview_eval(w.w, s)...

main.go

Source:main.go

1// Copyright 2022 The o11y toolkit Authors2// spdx-license-identifier: apache-2.03//4// Licensed under the Apache License, Version 2.0 (the "License");5// you may not use this file except in compliance with the License.6// You may obtain a copy of the License at:7//8//   http://www.apache.org/licenses/LICENSE-2.09//10// Unless required by applicable law or agreed to in writing, software11// distributed under the License is distributed on an "AS IS" BASIS,12// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.13// See the License for the specific language governing permissions and14// limitations under the License.15//go:build js && wasm16// +build js,wasm17package main18import (19	"fmt"20	"strings"21	"syscall/js"22	"github.com/prometheus/client_golang/prometheus/testutil/promlint"23)24func main() {25	c := make(chan struct{}, 0)26	js.Global().Set("metricslint", js.FuncOf(metriclint))27	js.Global().Set("loadexample", js.FuncOf(loadexample))28	jsDoc := js.Global().Get("document")29	jsDoc.Call("getElementById", "runButton").Set("disabled", false)30	jsDoc.Call("getElementById", "exampleButton").Set("disabled", false)31	jsDoc.Call("getElementById", "loadingWarning").Get("style").Set("display", "none")32	<-c33}34func loadexample(this js.Value, args []js.Value) interface{} {35	jsDoc := js.Global().Get("document")36	res := jsDoc.Call("getElementById", "metricInput")37	res.Set("value", `# HELP process_cpu_seconds_total Total user and system CPU time spent in seconds.38# TYPE process_cpu_seconds_total counter39process_cpu_seconds_total 203674.0540# HELP process_max_fds Maximum number of open file descriptors.41# TYPE process_max_fds gauge42process_max_fds 102443# HELP process_open_fds Number of open file descriptors.44# TYPE process_open_fds gauge45process_open_fds 1046`)47	return nil48}49func metriclint(this js.Value, args []js.Value) interface{} {50	jsDoc := js.Global().Get("document")51	res := jsDoc.Call("getElementById", "resultDiv")52	metrics := strings.NewReader(args[0].String() + "\n")53	l := promlint.New(metrics)54	problems, err := l.Lint()55	if err != nil {56		res.Set("innerHTML", fmt.Sprintf(`57	<blockquote class="gdoc-hint danger">58	<div class="gdoc-hint__title flex align-center">59		<svg class="gdoc-icon gdoc_dangerous"><use xlink:href="#gdoc_dangerous"></use></svg>60		<span>Parsing error</span>61	</div>62	<div class="gdoc-hint__text">63	  %s64	</div>65	</blockquote>66	`, err.Error()))67		return nil68	}69	if strings.TrimSpace(args[0].String()) == "" {70		res.Set("innerHTML", `71	<blockquote class="gdoc-hint important">72	<div class="gdoc-hint__title flex align-center">73		<svg class="gdoc-icon gdoc_error_outline"><use xlink:href="#gdoc_error_outline"></use></svg>74		<span>No input</span>75	</div>76	<div class="gdoc-hint__text">77	  The input provided is empty. Please paste metrics into the text area.78	</div>79	</blockquote>80	`)81		return nil82	}83	if len(problems) == 0 {84		res.Set("innerHTML", `85	<blockquote class="gdoc-hint tip">86	<div class="gdoc-hint__title flex align-center">87		<svg class="gdoc-icon gdoc_check"><use xlink:href="#gdoc_check"></use></svg>88		<span>Success</span>89	</div>90	<div class="gdoc-hint__text">91	  Input has been parsed successfully.92	</div>93	</blockquote>94	`)95		return nil96	}97	var pbs string98	for _, p := range problems {99		pbs += fmt.Sprintf("<li><code>%s</code>: %s</li>", p.Metric, p.Text)100	}101	res.Set("innerHTML", fmt.Sprintf(`102	<blockquote class="gdoc-hint important">103	<div class="gdoc-hint__title flex align-center">104		<svg class="gdoc-icon gdoc_fire"><use xlink:href="#gdoc_fire"></use></svg>105		<span>Issues found</span>106	</div>107	<div class="gdoc-hint__text">108	  The input can be parsed but there are linting issues:109	  <ul>%s</ul>110	</div>111	</blockquote>112	`, pbs))113	return nil114}...

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