slice()、substring()或split()方法来切割字符串。，，``javascript，let str = "Hello, World!";，let slicedStr = str.slice(0, 5); // "Hello"，let substringStr = str.substring(7, 12); // "World"，let splitStr = str.split(", "); // ["Hello", "World!"]，``slice()、substring()或split()方法来切割字符串。，，``javascript，let str = "Hello, World!";，let slicedStr = str.slice(0, 5); // "Hello"，let substringStr = str.substring(7, 12); // "World"，let splitStr = str.split(", "); // ["Hello", "World!"]，``Powered By Z-BlogPHP 1.7.3