28 lines
900 B
JavaScript
28 lines
900 B
JavaScript
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'use strict';
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module.exports = (str, count, opts) => {
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// Support older versions: use the third parameter as options.indent
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// TODO: Remove the workaround in the next major version
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const options = typeof opts === 'object' ? Object.assign({indent: ' '}, opts) : {indent: opts || ' '};
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count = count === undefined ? 1 : count;
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if (typeof str !== 'string') {
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throw new TypeError(`Expected \`input\` to be a \`string\`, got \`${typeof str}\``);
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}
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if (typeof count !== 'number') {
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throw new TypeError(`Expected \`count\` to be a \`number\`, got \`${typeof count}\``);
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}
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if (typeof options.indent !== 'string') {
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throw new TypeError(`Expected \`options.indent\` to be a \`string\`, got \`${typeof options.indent}\``);
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}
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if (count === 0) {
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return str;
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}
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const regex = options.includeEmptyLines ? /^/mg : /^(?!\s*$)/mg;
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return str.replace(regex, options.indent.repeat(count));
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}
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;
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