hamiltondanielb
/ gist:a174bc415fdd71966de1
Last active
December 5, 2022 12:52
ES6 String contains, starts with, ends with to ES5
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| String.prototype.contains = String.prototype.contains || function(str) { | |
| return this.indexOf(str) >= 0; | |
| }; | |
| String.prototype.startsWith = String.prototype.startsWith || function(prefix) { | |
| return this.indexOf(prefix) === 0; | |
| }; | |
| String.prototype.endsWith = String.prototype.endsWith || function(suffix) { | |
| return this.indexOf(suffix, this.length - suffix.length) >= 0; |