1 | var baseClamp = require('./_baseClamp'),
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2 | baseToString = require('./_baseToString'),
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3 | toInteger = require('./toInteger'),
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4 | toString = require('./toString');
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5 |
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6 | /**
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7 | * Checks if `string` starts with the given target string.
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8 | *
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9 | * @static
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10 | * @memberOf _
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11 | * @since 3.0.0
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12 | * @category String
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13 | * @param {string} [string=''] The string to inspect.
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14 | * @param {string} [target] The string to search for.
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15 | * @param {number} [position=0] The position to search from.
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16 | * @returns {boolean} Returns `true` if `string` starts with `target`,
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17 | * else `false`.
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18 | * @example
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19 | *
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20 | * _.startsWith('abc', 'a');
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21 | * // => true
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22 | *
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23 | * _.startsWith('abc', 'b');
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24 | * // => false
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25 | *
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26 | * _.startsWith('abc', 'b', 1);
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27 | * // => true
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28 | */
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29 | function startsWith(string, target, position) {
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30 | string = toString(string);
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31 | position = position == null
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32 | ? 0
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33 | : baseClamp(toInteger(position), 0, string.length);
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34 |
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35 | target = baseToString(target);
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36 | return string.slice(position, position + target.length) == target;
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37 | }
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38 |
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39 | module.exports = startsWith;
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