flow like the river

VISUALIZACION/node_modules/htmlnano/lib/modules/collapseWhitespace.js

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+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+exports.default = collapseWhitespace;
+
+var _helpers = require('../helpers');
+
+var noWhitespaceCollapseElements = ['script', 'style', 'pre', 'textarea'];
+
+/** Collapses redundant whitespaces */
+function collapseWhitespace(tree, options, collapseType) {
+    if (collapseType !== 'conservative' && collapseType !== 'all') {
+        collapseType = 'conservative';
+    }
+
+    tree.forEach(function (node, index) {
+        if (typeof node === 'string' && !(0, _helpers.isComment)(node)) {
+            node = collapseRedundantWhitespaces(node, collapseType, tree.walk !== undefined);
+        }
+
+        var isAllowCollapseWhitespace = noWhitespaceCollapseElements.indexOf(node.tag) === -1;
+        if (node.content && node.content.length && isAllowCollapseWhitespace) {
+            node.content = collapseWhitespace(node.content, options, collapseType);
+        }
+
+        tree[index] = node;
+    });
+
+    return tree;
+}
+
+function collapseRedundantWhitespaces(text, collapseType) {
+    var isTopLevel = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
+
+    text = text && text.length > 0 ? text.replace(/\s+/g, ' ') : '';
+    if (collapseType === 'all' || isTopLevel) {
+        text = text.trim();
+    }
+
+    return text;
+}