настройка webpack

node_modules/webpack-sources/lib/PrefixSource.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+var Source = require("./Source");
+var SourceNode = require("source-map").SourceNode;
+
+var REPLACE_REGEX = /\n(?=.|\s)/g;
+
+function cloneAndPrefix(node, prefix, append) {
+	if(typeof node === "string") {
+		var result = node.replace(REPLACE_REGEX, "\n" + prefix);
+		if(append.length > 0) result = append.pop() + result;
+		if(/\n$/.test(node)) append.push(prefix);
+		return result;
+	} else {
+		var newNode = new SourceNode(
+			node.line,
+			node.column,
+			node.source,
+			node.children.map(function(node) {
+				return cloneAndPrefix(node, prefix, append);
+			}),
+			node.name
+		);
+		newNode.sourceContents = node.sourceContents;
+		return newNode;
+	}
+};
+
+class PrefixSource extends Source {
+	constructor(prefix, source) {
+		super();
+		this._source = source;
+		this._prefix = prefix;
+	}
+
+	source() {
+		var node = typeof this._source === "string" ? this._source : this._source.source();
+		var prefix = this._prefix;
+		return prefix + node.replace(REPLACE_REGEX, "\n" + prefix);
+	}
+
+	node(options) {
+		var node = this._source.node(options);
+		var prefix = this._prefix;
+		var output = [];
+		var result = new SourceNode();
+		node.walkSourceContents(function(source, content) {
+			result.setSourceContent(source, content);
+		});
+		var needPrefix = true;
+		node.walk(function(chunk, mapping) {
+			var parts = chunk.split(/(\n)/);
+			for(var i = 0; i < parts.length; i += 2) {
+				var nl = i + 1 < parts.length;
+				var part = parts[i] + (nl ? "\n" : "");
+				if(part) {
+					if(needPrefix) {
+						output.push(prefix);
+					}
+					output.push(new SourceNode(mapping.line, mapping.column, mapping.source, part, mapping.name));
+					needPrefix = nl;
+				}
+			}
+		});
+		result.add(output);
+		return result;
+	}
+
+	listMap(options) {
+		var prefix = this._prefix;
+		var map = this._source.listMap(options);
+		return map.mapGeneratedCode(function(code) {
+			return prefix + code.replace(REPLACE_REGEX, "\n" + prefix);
+		});
+	}
+
+	updateHash(hash) {
+		if(typeof this._source === "string")
+			hash.update(this._source);
+		else
+			this._source.updateHash(hash);
+		if(typeof this._prefix === "string")
+			hash.update(this._prefix);
+		else
+			this._prefix.updateHash(hash);
+	}
+}
+
+require("./SourceAndMapMixin")(PrefixSource.prototype);
+
+module.exports = PrefixSource;