| 1 | ;
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| 2 |
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| 3 | var isString = require('./string');
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| 4 |
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| 5 | var CONTAINS_ONLY_WHITESPACES = /^\s*$/;
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| 6 |
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| 7 | /**
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| 8 | * Checks whether a value is empty string or contains only whitespaces
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| 9 | *
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| 10 | * @function blank
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| 11 | *
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| 12 | * @example
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| 13 | * var is = require('predicates');
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| 14 | *
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| 15 | * is.blank(''); // true
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| 16 | * is.blank(' '); // true
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| 17 | * is.blank('test'); // false
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| 18 | *
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| 19 | * @param {String} value
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| 20 | * @returns {Boolean}
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| 21 | */
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| 22 | module.exports = function isBlank(value) {
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| 23 | return isString(value) && (value === '' || CONTAINS_ONLY_WHITESPACES.test(value));
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| 24 | };
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