JavaScript offers many ways to check if a string contains a substring. Learn the canonical way, and also find out all the options you have, using plain JavaScript
To check if a string contains a substring using String.includes() in JavaScript: Call the String.includes() method on the string. Pass the substring as a parameter, e.g. String.includes(substr). The String.includes() method returns true if the substring is contained in the string. ...
To check if a Javascript String Contains a substring or not, we can use 7 different Javascript methods as listed in below table.
1. String.contains() Method The first and most popular method used in Java for checking if a string contains another string is contains() from the String class. This method returns a boolean value based on whether the substring exists in the this string or not. The contains() method search...
# Check if Array contains any element of another Array using for You can also use a basic for loop to check if an array contains any element of another array. index.js const arr1 = ['pizza', 'cake', 'cola']; const arr2 = ['pizza', 'beer']; let containsAny = false; for (let...
check if the string contains spaces by passing a whitespace string to the method. Since the method returns an index when a whitespace exists, we can check if the value is greater than or equal to zero which returnstrueif there is a whitespace in any index of the string andfalseif ...
Vue.JS check if Array,Object or String is empty: In Vue.js, To check if an array is empty in Vue.js, you can use the Array.length property, which returns the number of elements in the array To check if the string is empty in Vue.js, you can use the
Check if a string is null or empty in XSLT 多条件查询 string.Format("/root/deviceList//item/guid[{0}]", strBuilder.ToString()) "/root/deviceList//item/guid[text()=\"h\" or text()=\"a\" or text()=\"c\"]"谓词嵌套var nodes = xmlDoc.SelectNodes(string.Format("/root/device...
In React.js, you can use the classList property to check if an element contains a specific class. Access the element's classList and use the contains method with the desired class name. This returns a boolean, indicating whether the class is present in t
for(var i = 0, j = classes.length; i < j; i++) { if(hasClass(test, classes[i])) { test.innerHTML = "I have " + classes[i]; break; } } It’s also less redundant 資料來源: https://stackoverflow.com/questions/5898656/check-if-an-element-contains-a-class-in-javascript...