How JavaScript uses the dateStrForma function

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DateStrForma: converts a specified string from one time format to another. The format of From should correspond to the location of str

Function dateStrForma (str, from, to) {/ / '20190626'' YYYYMMDD' 'YYYY' str + = 'let Y =''if (Y = from.indexOf ('YYYY')) {Y = str.substr (Y, 4) to = to.replace (/ YYYY | yyyy/g,Y)} else if (~ (Y = from.indexOf (' YY') {Y = str.substr (Y) 2) to = to.replace (/ YY | yy/g,Y)} let KJI ['I 'from.indexOf (slots) k = ~ I? Str.substr (I, 2):''to = to.replace (slots, k)}) return to} / / dateStrForma ('20190626,' YYYYMMDD', 'YYYY MM month DD date') = > June 26, 2019 / / dateStrForma ('121220190626 June,'-YYYYMMDD', 'YYYY MM month DD') = > June 26, 2019 / / dateStrForma ('0June 26, 2019', 'YYYY MMmonth DD') 'YYYYMMDD') = > 20190626Universe / regular can also be used to implement / /' 06.26,2019. Replace (/ (\ d {4}) year (\ d {2}) month (\ d {2}) day /,'$1murf / dateStrForma function 3') = > 2019-06-26 is all the content of the article "how to use dateStrForma functions in JavaScript". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!