browser

问题 I am trying to download a pdf file in my Angular app. The server (JBoss) serves a file with Content-type : application/pdf and Content- Disposition header set to attachment. I can see these headers quite well in fiddler response. However in my subscribe callback I can't see the same headers. Instead the header contains two property namely: _headers and _normalizedHeaders While making the GET call. I do: `this._http.get(url, {responseType: 'arraybuffer'}).subscribe((file: Response)=>{ //Cant

问题 I would like to know how to implement a "ctrl+f5" command into my HTML page. I can use javascript or html. It should be run only when people click in a link. Thanks, Alex 回答1: You should be able to use this javascript to suite your need: onClick="window.location.reload(true)" window.location.reload(true) has been deprecated. You can use: window.location.href = window.location.href 回答2: Something like this? <a href="document.location.reload(true);document.location='/mylink'">Click here to

问题 I would like to know how to implement a "ctrl+f5" command into my HTML page. I can use javascript or html. It should be run only when people click in a link. Thanks, Alex 回答1: You should be able to use this javascript to suite your need: onClick="window.location.reload(true)" window.location.reload(true) has been deprecated. You can use: window.location.href = window.location.href 回答2: Something like this? <a href="document.location.reload(true);document.location='/mylink'">Click here to

问题 I read High Performance Web Sites: Essential Knowledge for Front-End Engineers and in it the author suggests that all JavaScript code should be externalized and put at the bottom of the page instead of putting it in the head. This is illustrated in this example. The external script tag blocks both downloading and progressive rendering of a page, so the solution was to put it at the bottom of the page. However, in his second book Even Faster Web Sites: Performance Best Practices for Web

问题 I read High Performance Web Sites: Essential Knowledge for Front-End Engineers and in it the author suggests that all JavaScript code should be externalized and put at the bottom of the page instead of putting it in the head. This is illustrated in this example. The external script tag blocks both downloading and progressive rendering of a page, so the solution was to put it at the bottom of the page. However, in his second book Even Faster Web Sites: Performance Best Practices for Web

问题 I read High Performance Web Sites: Essential Knowledge for Front-End Engineers and in it the author suggests that all JavaScript code should be externalized and put at the bottom of the page instead of putting it in the head. This is illustrated in this example. The external script tag blocks both downloading and progressive rendering of a page, so the solution was to put it at the bottom of the page. However, in his second book Even Faster Web Sites: Performance Best Practices for Web

问题 It is so easy to use eventEmitter in node.js: var e = new EventEmitter(); e.on('happy', function(){console.log('good')}); e.emit('happy'); Any client side EventEmitter in browser native? 回答1: In modern browsers, there is EventTarget. class MyClass extends EventTarget { doSomething() { this.dispatchEvent(new Event('something')); } } const instance = new MyClass(); instance.addEventListener('something', (e) => { console.log('Instance fired "something".', e); }); instance.doSomething();

问题 It is so easy to use eventEmitter in node.js: var e = new EventEmitter(); e.on('happy', function(){console.log('good')}); e.emit('happy'); Any client side EventEmitter in browser native? 回答1: In modern browsers, there is EventTarget. class MyClass extends EventTarget { doSomething() { this.dispatchEvent(new Event('something')); } } const instance = new MyClass(); instance.addEventListener('something', (e) => { console.log('Instance fired "something".', e); }); instance.doSomething();

问题 It is so easy to use eventEmitter in node.js: var e = new EventEmitter(); e.on('happy', function(){console.log('good')}); e.emit('happy'); Any client side EventEmitter in browser native? 回答1: In modern browsers, there is EventTarget. class MyClass extends EventTarget { doSomething() { this.dispatchEvent(new Event('something')); } } const instance = new MyClass(); instance.addEventListener('something', (e) => { console.log('Instance fired "something".', e); }); instance.doSomething();

问题 Assume browser default settings, and content is sent without expires headers. user visits website, browser caches images etc. user does not close browser, or refresh page. user continues to surf site normally. assume the browse doesn't dump the cache for any reason. The browser will cache images etc as the user surfs, but it's unclear when it will issue a conditional GET request to ask about content freshness (apart from refreshing the page). If this is a browser specific setting, where can I