60 lines
1.4 KiB
JavaScript
60 lines
1.4 KiB
JavaScript
"use strict";
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function dedent(strings) {
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var raw = void 0;
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if (typeof strings === "string") {
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// dedent can be used as a plain function
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raw = [strings];
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} else {
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raw = strings.raw;
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}
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// first, perform interpolation
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var result = "";
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for (var i = 0; i < raw.length; i++) {
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result += raw[i].
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// join lines when there is a suppressed newline
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replace(/\\\n[ \t]*/g, "").
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// handle escaped backticks
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replace(/\\`/g, "`");
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if (i < (arguments.length <= 1 ? 0 : arguments.length - 1)) {
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result += arguments.length <= i + 1 ? undefined : arguments[i + 1];
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}
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}
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// now strip indentation
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var lines = result.split("\n");
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var mindent = null;
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lines.forEach(function (l) {
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var m = l.match(/^(\s+)\S+/);
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if (m) {
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var indent = m[1].length;
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if (!mindent) {
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// this is the first indented line
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mindent = indent;
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} else {
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mindent = Math.min(mindent, indent);
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}
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}
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});
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if (mindent !== null) {
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result = lines.map(function (l) {
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return l[0] === " " ? l.slice(mindent) : l;
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}).join("\n");
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}
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// dedent eats leading and trailing whitespace too
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result = result.trim();
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// handle escaped newlines at the end to ensure they don't get stripped too
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return result.replace(/\\n/g, "\n");
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}
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if (typeof module !== "undefined") {
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module.exports = dedent;
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}
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