// read values with a string, same result as above // but works with special characters and spaces // and of course variables obj["key1"] === 1; obj["key2"] === 2; // read with a variable var key1Str = "key1"; obj[key1Str] === 1;...
,可以使用`console.log()`函数来实现。该函数用于在浏览器的控制台或者命令行中输出信息。 示例代码如下: ```javascript var variableName = "Hello...
在JavaScript中,可以使用字符串作为函数名。这种技术被称为动态函数调用或函数动态调用。它允许根据运行时的条件来选择要调用的函数。 在JavaScript中,函数可以存储在变量中,因此可以通过...
For example, each of the following is valid JavaScript for assigning a string to a variable: x=‘string’; x=“string”; (x)=(‘string’); this.x=‘string’; x={‘a’:’string’}.a; [x,y,z]=[‘string1’,’string2’,’string3’]; x=/z(.*)/(‘zstring’)[1]; x=‘...
consthome="c:\\temp"; 也可以在换行之前加上反斜杠以转义换行。这样反斜杠和换行都不会出现在字符串的值中。 js conststr="this string \ is broken \ across multiple \ lines.";console.log(str);// this string is broken across multiple lines....
JS variable inside a string You can include a variable value inside a string using string interpolation or concatenation. var my_name = 'John'; var s = `hello ${my_name}, how are you doing`; console.log(s); // prints hello John, how are you doing ...
We can use theeval()function and thewindowobject to learn JavaScript dynamic variable names. Theeval()is a global object’s function property that executes JavaScript code represented as a string. Theeval()evaluates expression if its argument is an expression and runs statements if its argument’...
字符串(String) 字符串类型用于表示文本数据,用单引号或双引号括起来。例如: let name = "John"; let message = 'Hello, world!'; 字符串可以进行拼接、截取和其他常见的文本操作。 布尔值(Boolean) 布尔类型表示真或假的值,只有两个可能的取值:true 和false。例如: let isAdult = true; let isStudent ...
⬆ back to topDon't add unneeded contextIf your class/object name tells you something, don't repeat that in your variable name.Bad:const Car = { carMake: "Honda", carModel: "Accord", carColor: "Blue" }; function paintCar(car, color) { car.carColor = color; }...
同样,变量 myVariable 与 MyVariable 也是不同的。 空格 JavaScript 会忽略多余的空格。您可以向脚本添加空格,来提高其可读性。下面的两行代码是等效的: var name="Hello"; var name = "Hello"; 对代码行进行折行 您可以在文本字符串中使用反斜杠对代码行进行换行。下面的例子会正确地显示: ...