wsemi
Version:
A support package for web developer.
102 lines (88 loc) • 1.96 kB
JavaScript
import htmlparser from 'htmlparser' //要能於nodejs下運行, 故不使用瀏覽器動態加載
import each from 'lodash/each'
import join from 'lodash/join'
import size from 'lodash/size'
import isestr from './isestr.mjs'
import getGlobal from './getGlobal.mjs'
function getHtmlparser() {
let g = getGlobal()
let x = htmlparser || g.htmlparser || g.Tautologistics.NodeHtmlParser
// if (x.default) {
// x = x.default
// }
return x
}
/**
* html轉純文字
*
* Unit Test: {@link https://github.com/yuda-lyu/wsemi/blob/master/test/html2str.test.mjs Github}
* @memberOf wsemi
* @param {String} html 輸入html字串
* @returns {String} 回傳純文字字串
* @example
*
* let h = `
* <!DOCTYPE html>
* <html>
*
* <body>
* <h1>My First Heading</h1>
* <p>My first paragraph.</p>
* </body>
*
* </html>
* `
*
* let c = html2str(h)
* console.log(c)
* // =>
* //
* //
* //
* //
* // My First Heading
* // My first paragraph.
* //
* //
* //
* //
*
*/
function html2str(html) {
let err = null
//check
if (!isestr(html)) {
return ''
}
//useHtmlparser
let useHtmlparser = getHtmlparser()
//handler
let handler = new useHtmlparser.DefaultHandler(function (error, dom) {
if (error) {
err = error
}
})
//parser
let parser = new useHtmlparser.Parser(handler)
parser.parseComplete(html)
//check
if (err !== null) {
return err
}
//to text
let r = []
function getText(d) {
each(d, (v) => {
if (size(v.children) > 0) {
getText(v.children)
}
if (v.type === 'text') {
r.push(v.data)
}
})
}
getText(handler.dom)
r = join(r, '')
return r
}
export default html2str