";constsearchValue="world";if(str.toLowerCase().includes(searchValue.toLowerCase())){console.log(`${searchValue}is found (case-insensitive).`);} 2. 从指定位置开始查找:虽然includes()本身不支持从指定索引开始查找,但可以通过截取子字符串实现类似效果。 conststr="Hello, world! How are you?";...
在 JavaScript 中有两种常用的方法来检查字符串是否包含子字符串。 更现代的方式是 String#includes() 功能 。const str = 'Arya Stark';str.includes('Stark'); // truestr.includes('Snow'); // false 您可以使用 String#includes() 在所有现代浏览 除了 Internet Explorer 中。 你也可以使用 String#incl...
== -1) { //String contains } if(actualstring.toUpperCase().includes(targetstring.toUpperCase()) { //String contains } if(actualstring.toUpperCase.indexOf(targetstring.toUpperCase()) !== -1) { //String contains } To check for case insensitive string contains, use the regular expres...
We look at the defaultArray.prototype.sortbehavior and discuss how you can do case insensitive string sorting. const foo =['Alpha','beta','Gamma','delta']; foo.sort((a, b)=>a.toLowerCase().localeCompare(b.toLowerCase())); foo.forEach(x=>console.log(x));/*"Alpha" "beta" "del...
Check if a string includes "world". Start at position 12: lettext ="Hello world, welcome to the universe."; text.includes("world",12); Try it Yourself » Notes includes()is case sensitive. includes()is anES6 feature. includes()is not supported in Internet Explorer. ...
A stringA new string where the specified value(s) has been replaced. More Examples A global, case-insensitive replacement: lettext ="Mr Blue has a blue house and a blue car"; letresult = text.replace(/blue/gi,"red"); Try it Yourself » ...
String.prototype.endsWith() 确定字符串是否以字符串 searchString 的字符结尾。 String.prototype.includes() 确定调用字符串是否包含 searchString。 String.prototype.indexOf() 返回在调用 String 对象中第一次出现的 searchValue 的索引,如果未找到则返回 -1。 String.prototype.isWellFormed() 返回一个布尔值,...
JavaScript中 includes() 方法是字符串对象的一个内置方法,旨在提供一种简洁而直观的方式,用于检测一个字符串中是否包含指定的子字符串。以下是对其功能、...
gThe pattern should be appliedglobally (i.e., to every instance of the pattern in a string) iThe pattern iscase-insensitive mEach physical line of the target string is treated as the start of a string If you have been exposed to regular expressions in the past,Table 1-1lists the regula...
matcherfunctioncase insensitiveThe method used to determine if a query matches an item. Accepts a single argument, theitemagainst which to test the query. Access the current query withthis.query. Return a booleantrueif query is a match. ...