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vue-head-es6.js
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/* eslint-disable */
;(() => {
'use strict'
const opt = {
complement: window.document.title,
separator: '|'
}
const diffTitle = {}
let els = []
let diffEls = []
let installed = false
const util = {
/**
* Shorthand
* @type {Object}
*/
shorthand: {
ch: 'charset',
tg: 'target',
n: 'name',
he: 'http-equiv',
ip: 'itemprop',
c: 'content',
p: 'property',
sc: 'scheme',
r: 'rel',
h: 'href',
sz: 'sizes',
t: 'type',
s: 'src',
a: 'async',
d: 'defer',
i: 'inner'
},
/**
* This function return the element <head>
* @type {Function}
* @return {Object}
*/
getPlace (place) {
return window.document.getElementsByTagName(place)[0]
},
/**
* Undo the window.document title for previous state
* @type {Function}
* @param {Object} state
*/
undoTitle (state) {
if (!state.before) return
window.document.title = state.before
},
/**
* Undo elements to its previous state
* @type {Function}
*/
undo () {
if (!els.length) return
els.map(el => {
el.parentElement.removeChild(el)
})
els = []
},
/**
* Set attributes in element
* @type {Function}
* @param {Object} obj
* @param {HTMLElement} el
* @return {HTMLElement} with defined attributes
*/
prepareElement (obj, el) {
Object.keys(obj).map(prop => {
let sh = (this.shorthand[prop] || prop)
if (sh.match(/(body|undo|replace)/g)) return
if (sh === 'inner') {
el.textContent = obj[prop]
return
}
el.setAttribute(sh, obj[prop])
})
return el
},
/**
* Change window.document title
* @type {Function}
* @param {Object} val
*/
title (val) {
if (!val) return
diffTitle.before = opt.complement
let title = `${val.inner} ${val.separator || opt.separator} ${val.complement || opt.complement}`
window.document.title = title.trim()
},
update () {
if (!els.length) return
els.forEach((el, key) => {
if (diffEls[key] && !diffEls[key].isEqualNode(el)) {
el.parentElement.replaceChild(diffEls[key], els[key])
els.splice(key, 1, diffEls[key])
return
}
})
diffEls = []
},
add (obj, el, parent) {
parent.appendChild(el)
// Fixed elements that do not suffer removal
if (obj.undo !== undefined && !obj.undo) return
// Elements which are removed
els.push(el)
},
/**
* Handle of create elements
* @type {Function}
* @param {Array} arr
* @param {String} tag - style, link, meta, script, base
* @param {String} place - Default 'head'
* @param {Boolean} update
*/
handle (arr, tag, place, update) {
if (!arr) return
arr.map(obj => {
let parent = (obj.body) ? this.getPlace('body') : this.getPlace(place)
let el = window.document.getElementById(obj.id) || window.document.createElement(tag)
// Elements that will substitute data
if (el.hasAttribute('id') || obj.id) {
this.prepareElement(obj, el)
return
}
// Other elements
this.prepareElement(obj, el)
// Updated elements
if (update) {
diffEls.push(el)
return
}
// Add elements in Node
this.add(obj, el, parent)
})
}
}
/**
* Plugin | vue-head
* @param {Function} Vue
* @param {Object} options
*/
const VueHead = (Vue, options) => {
if (installed) return
installed = true
if (options) {
Vue.util.extend(opt, options)
}
function init (update) {
let head = (typeof this.$options.head === 'function') ? this.$options.head.bind(this)() : this.$options.head
if (!head) return
Object.keys(head).map(key => {
let prop = head[key]
if (!prop) return
let obj = (typeof prop === 'function') ? head[key].bind(this)() : head[key]
if (key === 'title') {
util[key](obj)
return
}
util.handle(obj, key, 'head', update)
})
this.$emit('okHead')
}
function destroy (head) {
if (!this.$options.head) return
util.undoTitle(diffTitle)
util.undo()
}
// v1
if (Vue.version.match(/[1].(.)+/g)) {
Vue.mixin({
ready () {
init.bind(this)()
},
destroyed () {
destroy(this.$options.head)
},
events: {
updateHead () {
init.bind(this)(true)
util.update()
}
}
})
}
// v2
if (Vue.version.match(/[2].(.)+/g)) {
Vue.mixin({
created () {
this.$on('updateHead', () => {
init.bind(this)(true)
util.update()
})
},
mounted () {
init.bind(this)()
},
beforeDestroy () {
destroy.bind(this)()
}
})
}
}
VueHead.version = '2.0.11'
// auto install
if (typeof Vue !== 'undefined') {
Vue.use(VueHead)
}
if(typeof exports === 'object' && typeof module === 'object') {
module.exports = VueHead
} else if(typeof define === 'function' && define.amd) {
define(function () { return VueHead })
} else if (typeof window !== 'undefined') {
window.VueHead = VueHead
}
})()