react-saasify-chrisvxd/example/node_modules/htmlnano/lib/helpers.js

React components for Saasify web clients.

'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.isAmpBoilerplate = isAmpBoilerplate;
exports.isComment = isComment;
exports.isConditionalComment = isConditionalComment;
exports.isStyleNode = isStyleNode;
exports.extractCssFromStyleNode = extractCssFromStyleNode;
var ampBoilerplateAttributes = ['amp-boilerplate', 'amp4ads-boilerplate', 'amp4email-boilerplate'];

function isAmpBoilerplate(node) {
    if (!node.attrs) {
        return false;
    }
    var _iteratorNormalCompletion = true;
    var _didIteratorError = false;
    var _iteratorError = undefined;

    try {
        for (var _iterator = ampBoilerplateAttributes[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
            var attr = _step.value;

            if (attr in node.attrs) {
                return true;
            }
        }
    } catch (err) {
        _didIteratorError = true;
        _iteratorError = err;
    } finally {
        try {
            if (!_iteratorNormalCompletion && _iterator.return) {
                _iterator.return();
            }
        } finally {
            if (_didIteratorError) {
                throw _iteratorError;
            }
        }
    }

    return false;
}

function isComment(content) {
    return (content || '').trim().search('<!--') === 0;
}

function isConditionalComment(content) {
    return (content || '').trim().search(/<!--\[if/) === 0;
}

function isStyleNode(node) {
    return node.tag === 'style' && !isAmpBoilerplate(node) && 'content' in node && node.content.length > 0;
}

function extractCssFromStyleNode(node) {
    return Array.isArray(node.content) ? node.content.join(' ') : node.content;
}