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70 lines
1.9 KiB
70 lines
1.9 KiB
2 years ago
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var each = require('./each');
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var isStr = require('./isStr');
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var isUndef = require('./isUndef');
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var contain = require('./contain');
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var isArr = require('./isArr');
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var isObj = require('./isObj');
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var toArr = require('./toArr');
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exports = function(name, content) {
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if (isUndef(name)) return getAllMeta();
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var isGetter = (isStr(name) && isUndef(content)) || isArr(name);
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if (isGetter) return getMeta(name);
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var metas = name;
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if (!isObj(metas)) {
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metas = {};
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metas[name] = content;
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}
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setMeta(metas);
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};
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exports.remove = function(nameList) {
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nameList = toArr(nameList);
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each(nameList, function(name) {
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var meta = selectMeta(name);
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if (meta) doc.head.removeChild(meta);
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});
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};
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var doc = document;
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function getAllMeta() {
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var ret = {};
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metaEach(function(name, content) {
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ret[name] = content;
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});
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return ret;
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}
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function getMeta(name) {
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if (isStr(name)) {
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var meta = selectMeta(name);
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if (meta) return meta.getAttribute('content');
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} else {
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var ret = {};
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metaEach(function(key, val) {
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if (contain(name, key)) ret[key] = val;
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});
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return ret;
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}
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}
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function setMeta(metas) {
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each(metas, function(content, name) {
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var meta = selectMeta(name);
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if (meta) return meta.setAttribute('content', content);
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meta = doc.createElement('meta');
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meta.setAttribute('name', name);
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meta.setAttribute('content', content);
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doc.head.appendChild(meta);
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});
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}
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function metaEach(fn) {
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var metaList = doc.querySelectorAll('meta');
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each(metaList, function(meta) {
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var name = meta.getAttribute('name');
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var content = meta.getAttribute('content');
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if (!name || !content) return;
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fn(name, content);
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});
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}
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function selectMeta(name) {
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return doc.querySelector('meta[name="' + name + '"]');
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}
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module.exports = exports;
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