HTML5在线参考手册

  • jsref function

    JavaScript function Statement JavaScript Statements Reference Example Declare a function and output "Hello World" in an element with id="demo", when the function is called: function myFunction() { // Declare a ...

  • jsref return

    JavaScript return Statement JavaScript Statements Reference Example Return the value of PI: function myFunction() {    return Math.PI;} The result will be: 3.141592653589793 Try it yourself » More "Try ...

  • jsref break

    JavaScript break Statement JavaScript Statements Reference Example In this example we use a for loop together with the break statement. Loop through a block of code, but exit the loop when the variable i is equal to "3": ...

  • jsref var

    JavaScript var Statement JavaScript Statements Reference Example Create a variable called carName and assign the value "Volvo" to it: var carName = "Volvo"; Try it yourself » More "Try it Yourself" ...

  • prop script src

    ... should create an external JavaScript file, instead of writing the same script over and over again. Save the script file with a .js extension, and then refer to it using the src attribute in the <script> tag. Note: The external script file ...

  • att script src

    ... should create an external JavaScript file, instead of writing the same script over and over again. Save the script file with a .js extension, and then refer to it using the src attribute in the <script> tag. Note: The external script file ...

  • att script src

    ... > 标签 实例 指向一个外部 JavaScript 文件: <script src="myscripts.js"></script> 尝试一下 » 浏览器支持 ... 的 JavaScript,就应该创建外部 JavaScript 文件,而不是重复编写相同的脚本。把脚本文件以 .js 扩展名进行保存,然后在 <script> 标签中使用 src 属性引用它。 注意:外部脚本文件不能包 ...

  • jsref continue

    JavaScript continue Statement JavaScript Statements Reference Example In this example we use a for loop together with the continue statement. Loop through a block of code, but skip the value of "3": var text = "" ...

  • jsref operators

    JavaScript Operators Reference « Previous Next Chapter » JavaScript operators are used to assign values, compare values, perform arithmetic operations, and more. JavaScript Arithmetic Operators Arithmetic operators are ...

  • jsref operators

    ← HTML DOM removeEventListener() 方法 HTML DOM querySelector() 方法 → JavaScript 运算符 JavaScript 运算符用于赋值,比较值,执行算术运算等。 JavaScript 算术运算符 算术运算符用于执行两个变量或值的运算。 赋值 y = 5, 以下表格将向你说明算术运算符的使用: 运算符 描述 例子 y ...

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