To check for case insensitive string contains, use the regular expressions. Add suffix “i” after the string regular expression as shown. var actualstring = "Javascript Regular Exp"; var regexp = "javascript"; /regexp/i.test(actualstring); //returns true ...
conststr="Hello, World!";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, ...
To do a case insensitive check if an array contains a string:Use the Array.findIndex() method to iterate over the array. Convert each array element and the string to lowercase and check for equality. If the condition is met, the element's index is returned. ...
The value of the number usually depends on whether the result is true or false or whether the resultant string contains a number. To understand this better, consider the following examples: alert(true+true)//2 alert(true+false)//1 alert(false+false)//0 Each code sample is a Boolean ...
Example 2: Matching sections in string conststring ="My name is Albert. YOUR NAME is Soyuj.";// expression matches case-insensitive "name is"+ any alphabets till period (.)constre =/name\sis\s[a-zA-Z]+\./gi; letresult = string.match(re); ...
Unlike the previous two methods, we can now do case insensitive searches with the i flag: > let str = 'StackAbuse'; > /stack/i.test(str); true As a more complex example, let's say you want to see if a string contains a zip code (5 digit postal codes), but you don't really...
String substr() See Also: String Search Methods String Templates String toUpperCase() String toLowerCase() String concat() String trim() String trimStart() String trimEnd() String padStart() String padEnd() String repeat() String replace() ...
Perform a global, case-insensitive search for "ain": lettext ="The rain in SPAIN stays mainly in the plain"; text.match(/ain/gi); Try it Yourself » Note If a regular expression does not include thegmodifier (global search),match()will return only the first match in the string. ...
When working with JavaScript, determining whether a string contains a specific substring is a common task. Whether you need case-sensitive checks or prefer a flexible, case-insensitive approach, this guide has it covered. The following shows you different ways of finding a substring in a JavaScrip...
String matching x.matches(“escape%”) – holds if x starts with “escape” x.regexpMatch(“escape.*”) – holds if x starts with “escape” x.regexpMatch(“(?i).*escape.*”) – holds if x contains “escape” (case insensitive)Access paths When multiple property accesses are chained...