replace()方法返回一个替换了指定模式的新字符串。 示例1:替换第一个匹配项 consttext ="Java is awesome. Java is fun."// passing a string as the first parameterletpattern ="Java";letnew_text = text.replace(pattern,"JavaScript");console.log(new_text);// passing a regex as the first parame...
String.prototype.replaceAll = function (find, replace) { var str = this; return str.replace(new RegExp(find, 'g'), replace); }; Run Code Online (Sandbox Code Playgroud) 编辑 如果您find将包含特殊字符,那么您需要转义它们: String.prototype.replaceAll = function (find, replace) { var str...
consttext ="javaSCRIPT JavaScript"// the first occurrence of javascript is replacedletpattern =/javascript/i;// case-insensitive searchletnew_text = text.replace(pattern,"JS");console.log(new_text)// JS JavaScript// all occurrences of javascript is replacedpattern =/javascript/gi;// case-insen...
return str.replace(/[.*+?^${}()|[]]/g, "$&"); // $& means the whole matched string } 我们可以在我们的String.prototype.replaceAll实现中调用escapeRegExp,但是,我不确定这会对性能产生多大影响(甚至对于不需要转义的字符串,如所有字母数字字符串)。 str = str.replace(/abc/g, ''); 回应评...
Let's assume we have the following string in which we wish to replace all occurrences of the word "foo" with "moo": const str = 'foobar, foo bar, Foo bar, Foobar'; Using String.prototype.rep
To replace all occurrences of a string in a text with the new one, use the replace() or replaceAll() method. Both these JavaScript methods do not change the original string. Instead, return a new string with the substrings replaced by a new substring. Alternatively, you could also use ...
functionstr_replace($searchString,$replaceString,$message){// We create regext to find the occurrencesvarregex;// If the $searchString is a stringif(typeof($searchString)=="string"){// Escape all the characters used by regex$searchString=$searchString.replace(/[.?*+^$[\]\\(){}|-]...
replace()函数是 JavaScript 的一个内置函数。它用另一个字符串或正则表达式替换给定字符串的一部分。它从一个给定的字符串中返回一个新的字符串,并保持原来的字符串不变。 Ourstring.replace(Specificvalue,Newvalue) Specificvalue将被新的值-Newvalue替换。
//Usethereplacemethod combinedwitha regular expressionwithglobalflagstoreplacealloccurrencesofa string.conststr="I love JavaScript, JavaScript is amazing!";console.log(str.replace(/JavaScript/g, "Node.js")); // "I love Node.js, Node.js is amazin...
There are several approaches to replacing all occurrences of a string. Thereplace()method or a regular expression with the global flag are some common approaches developers use. However, JavaScript introduced a new method namedreplaceAll()in 2021 to replace all the occurrences at once. However, t...