将浮点数解析为具有x位小数的字符串

Posted 2021-02-26

converts a number "v" to a float number and formats the string it with "d" decimals, used on input type text onblur="parseFloatString(this.value,2);"

function parseFloatString (v,d) {
	var x = parseFloat( !v ? 0 : v);
	x = parseFloat( Math.round(  x * Math.pow(10,d)  )  ) / Math.pow(10,d);
	y = x + "";
	if (y.indexOf(".")==-1) y = x + ".";
	var a = y.split(".");
	if (a[1].length<d) for(k=a[1].length;k<d;k++) a[1]+="0";
	y = a[0]+"."+a[1];
	return y;
}