39 lines
820 B
Plaintext
39 lines
820 B
Plaintext
export default function indentString(string, count = 1, options = {}) {
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const {
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indent = ' ',
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includeEmptyLines = false
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} = options;
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if (typeof string !== 'string') {
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throw new TypeError(
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`Expected \`input\` to be a \`string\`, got \`${typeof string}\``
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);
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}
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if (typeof count !== 'number') {
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throw new TypeError(
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`Expected \`count\` to be a \`number\`, got \`${typeof count}\``
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);
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}
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if (count < 0) {
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throw new RangeError(
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`Expected \`count\` to be at least 0, got \`${count}\``
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);
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}
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if (typeof indent !== 'string') {
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throw new TypeError(
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`Expected \`options.indent\` to be a \`string\`, got \`${typeof indent}\``
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);
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}
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if (count === 0) {
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return string;
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}
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const regex = includeEmptyLines ? /^/gm : /^(?!\s*$)/gm;
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return string.replace(regex, indent.repeat(count));
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}
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