JS: String.prototype.startsWith
New in JS2015.
str.startsWith(searchString)
-
- Return
true
if str starts with searchString. - Else, return
false
.
console.log("abcd".startsWith("ab")); console.log("abcd".startsWith("b") === false);
- Return
str.startsWith(searchString, position)
-
Check if start from position.
console.log("abcd".startsWith("b", 1));
JS String.prototype
- JS: String.prototype.constructor
- JS: String.prototype.at
- JS: String.fromCharCode
- JS: String.prototype.concat
- JS: String.prototype.repeat
- JS: String.prototype.trim
- JS: String.prototype.trimStart
- JS: String.prototype.trimEnd
- JS: String.prototype.padStart
- JS: String.prototype.padEnd
- JS: String.prototype.slice
- JS: String.prototype.substring
- JS: String.prototype.substr
- JS: String.prototype.indexOf
- JS: String.prototype.lastIndexOf
- JS: String.prototype.includes
- JS: String.prototype.startsWith
- JS: String.prototype.endsWith
- JS: String.prototype.search
- JS: String.prototype.match
- JS: String.prototype.matchAll
- JS: String.prototype.replace
- JS: String.prototype.split
- JS: String.prototype.toLowerCase
- JS: String.prototype.charAt
- JS: String.prototype.charCodeAt
- JS: String.prototype.codePointAt