startswith string function in javascript code example

Example 1: js start with

const str = 'Linux is great';
console.log(str.startsWith('Linux is'));// true
console.log(str.startsWith('Windows is'));// false
console.log(str.startsWith('ux is', 3));// true

Example 2: js startswith

var str = "Hello world, welcome to the universe.";
var n = str.startsWith("Hello");

Example 3: javascript multiple startswith

//There is NO possibility to passing an Array
//like startsWith(["Mon" | "Tues"])
if (newStr4.startsWith("Mon") || newStr4.startsWith("Tues") || ...)

//although you can use regular expression,
//but performance are lower than the solution above
 if (newStr4.matches("(Mon|Tues|Wed|Thurs|Fri).*"))

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