var flagNumber = 5;//一行固定放5个字,其余换行
var firstFiveChars = str.substring(0, flagNumber);
var sixChars = str.substring(flagNumber)
html = `<div>${firstFiveChars}<br/>${sixChars}</div>`
var flagNumber = 5;//一行固定放5个字,其余换行
var firstFiveChars = str.substring(0, flagNumber);
var sixChars = str.substring(flagNumber)
html = `<div>${firstFiveChars}<br/>${sixChars}</div>`