How to use javascript to calculate how many characters can be entered in the text box, javascript text box

How to use javascript to calculate how many characters can be entered in the text box, javascript text box

The following code is very simple. If you don't want to talk about it, go directly to the code.

// Input count // count: Total number of data records that can be imported function Calculation (v, count) {var span = $ (v ). next (); var valLength =$ (v ). val (). length; if (valLength> count) {$ (v ). val ($ (v ). val (). substr (0, count); valLength = count;} span. text ("You have entered the" + valLength + "character, and the remaining" + (count-valLength) + "character ");}

The above Code uses javascript to calculate the total number of characters that can be entered in the text box.