console.log("按钮button的innerText是:" + sendBtn.innerText) console.log("按钮button的textContent是:" + sendBtn.textContent) console.log("按钮button的outerHTML是:" + sendBtn.outerHTML) console.log("按钮button的value是:" + sendBtn.value) 结果如图: 看完了其实还是一脸懵逼状。。有的值一样,有...
瞎说, innerText 和 textContent 是作用一样的属性, 在比较早的firefox版本里只支持innerText, 不支持 textContent; 都是获取元素内的所有文本 innerHTML 是所有浏览器都支持的, 返回标签内容的HTML形式的文本 value是另一个概念, 基本上是表单元素特有的, 比如:input/textarea/select 之类. 意义是"值", 而不是"...
函数式编程是一种强调和使智能化代码编写的风格,可以最大程度地减少复杂性并增加模块化。这是一种通过巧妙地改变、组合和使用函数来编写更清洁的代码的方式。JavaScript 为这种方法提供了一个极好的媒介。互联网的脚本语言 JavaScript 实际上是一种本质上的函数式语言。通过学习如何暴露它作为函数式语言的真实身份,我们...
class Calculator { constructor(value = 0) { this.value = value; } add(num) { this.value += num; return this; // 返回实例以支持链式调用 } subtract(num) { this.value -= num; return this; } multiply(num) { this.value *= num; return this; } divide(num) { this.value /= num;...
}returnnameValue === 'auto' ? '0px': nameValue; }functionuncamelize(s) {//将CSS属性名由驼峰式转为普通式returns.replace(/[A-Z]/g,function(c) {return'-'+c.charAt(0).toLowerCase(); }); }functioncamelize(s) {//将CSS属性名转换成驼峰式returns.replace(/-[a-z]/gi,function(c) ...
Now, the value is 4, reflecting the addition of the new img element. Example 11-1. Demonstrating getElementsByTagName and the NodeList live collection property <!DOCTYPE html> NodeList //<![CDATA[ window.onload=function() { var imgs = document.getElementsByTagName('img'); alert(imgs...
(); button.textContent ="||"; }else{// pause the file, and display play symbolvideo.pause(); button.textContent =">"; } }// load video file from input fieldfunctiongetVideo(){varfileURL = document.getElementById("videoFile").value;// get input fieldif(fileURL !="") { video....
// bad const atom = { value: 1, addValue: function (value) { return atom.value + value; }, }; // good const atom = { value: 1, addValue(value) { return atom.value + value; }, }; 3.4 使用属性值的缩写。 eslint: object-shorthand 为什么? 它的写法和描述较短。 const lukeSkywa...
if (audioURL.value !== currentFile) { oAudio.src = audioURL.value; currentFile = audioURL.value; } // Tests the paused attribute and set state. if (oAudio.paused) { oAudio.play(); btn.textContent = "Pause"; } else { oAudio.pause(); btn.textContent = "Play"; } } c...
Do: Test doubles are a necessary evil because they are coupled to the application internals, yet some provide an immense value (Read here a reminder about test doubles: mocks vs stubs vs spies). However, the various techniques were not born equal: some of them, spies and stubs, are focuse...