mirror of https://github.com/jkjoy/sunpeiwen.git
23 lines
598 B
JavaScript
23 lines
598 B
JavaScript
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'use strict';
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// https://github.com/rails/rails/blob/v4.2.0/actionview/lib/action_view/helpers/text_helper.rb#L240
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function wordWrap(str, options = {}) {
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if (typeof str !== 'string') throw new TypeError('str must be a string!');
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const width = options.width || 80;
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const regex = new RegExp(`(.{1,${width}})(\\s+|$)`, 'g');
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const lines = str.split('\n');
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for (let i = 0, len = lines.length; i < len; i++) {
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const line = lines[i];
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if (line.length > width) {
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lines[i] = line.replace(regex, '$1\n').trim();
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}
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}
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return lines.join('\n');
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}
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module.exports = wordWrap;
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