| // Copyright (C) 2015 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| es6id: 21.1.3.18 |
| description: > |
| Returns true if searchString appears as a substring of the given string. |
| info: | |
| 21.1.3.18 String.prototype.startsWith ( searchString [ , position ] ) |
| |
| ... |
| 11. Let len be the number of elements in S. |
| 12. Let start be min(max(pos, 0), len). |
| 13. Let searchLength be the number of elements in searchStr. |
| 14. If searchLength+start is greater than len, return false. |
| 15. If the sequence of elements of S starting at start of length searchLength |
| is the same as the full element sequence of searchStr, return true. |
| ... |
| ---*/ |
| |
| var str = 'The future is cool!'; |
| |
| assert(str.startsWith('The '), 'str.startsWith("The ") === true'); |
| assert(str.startsWith('The future'), 'str.startsWith("The future") === true'); |
| assert(str.startsWith(str), 'str.startsWith(str) === true'); |
