String search() and String match() Thesearch()method returns the position of the first match. Thematch()method returns an array of matches. Regular Expression Search Methods In JavaScript, a regular expression text search, can be done with different methods. ...
stringObject.search(substr) stringObject.search(regexp) 1. 2. search()方法用于检索字符串中指定的子字符串,或检索与正则表达式相匹配的子字符串。它会返回第一个匹配的子字符串的起始位置,如果没有匹配的,则返回-1。 var str = 'abcDEF'; console.log(str.search('c')); //返回2 console.log(str....
Search Sign UpSign In Search results 1000+ packages found Sort by: Default Default Most downloaded this week Most downloaded this month Most dependents Recently published jsesc Given some data, jsesc returns the shortest possible stringified & ASCII-safe representation of that data. ...
JavaScript String match() Thematch()method returns an array containing the results of matching a string against a string (or a regular expression). Examples Perform a search for "ain": lettext ="The rain in SPAIN stays mainly in the plain"; ...
letstring1 ="I love to code in JavaScript."; // searching word "JavaScript" in the given stringletindex = string1.search("code"); console.log(index); Run Code Output 10 In the above example, we have passed a non-regular expression'code'in thesearch()method. ...
可以使用String作为toString()更可靠的代替方法,因为它在用于null和undefined时仍然有效。例如: js constnullVar=null;nullVar.toString();// TypeError: nullVar is nullString(nullVar);// "null"constundefinedVar=undefined;undefinedVar.toString();// TypeError: undefinedVar is undefinedString(undefinedVar);/...
JavaScript By Ceferino IV Villareal Use the includes() method to search for a substring inside a string: var word = "bravery"; console.log(word.includes(“rave”)); // true Copy Syntax This quick and easy way to check if one string contains another is very simple to implement. Just ...
TheindexOf()method can also be used to search for a single character in a string. Let's search for the first occurrence of the character 'a' in a string. conststr="JavaScript is a programming language.";constindex=str.indexOf('a');console.log(index);// Output: 1 ...
String.prototype.search() 方法的实现非常简单——它只是将该字符串作为调用实参拥有的 Symbol.search 方法的第一个参数。实际的实现来自于 RegExp.prototype[Symbol.search]()。 regexp 的g 标志对 search() 方法的结果没有影响,搜索总是以正则表达式的 lastIndex 为0 进行。有关 search() 方法行为的更多信息...
返回JavaScript String 对象参考手册(目录) 定义和用法 search() 方法用于检索字符串中指定的子字符串,或检索与正则表达式相匹配的子字符串。 语法 stringObject.search(regexp) 返回值 stringObject 中第一个与 regexp 相匹配的子串的起始位置。 注释:如果没有找到任何匹配的子串,则返回 -1。