javascript - How to create maximum 8 <input type="button"> with value A, B, C and so on? -


i trying create, @ max, 8 buttons , successful @ that, want give values buttons a, b, c , on.. here code have done far:

var buttonvalue = 1; function addbutton(){    if(buttonvalue <=8){       var targetdiv = document.getelementbyid('targetdiv');       var inputfield = document.createelement('input');       inputfield.setattribute('type','button');       inputfield.setattribute('id',"input-"+buttonvalue+"");       inputfield.setattribute('class','controls');       targetdiv.append(inputfield);          }    buttonvalue++; }

but want give values buttons a, b, c , on.

the character code a 65 ("a".charcodeat(0)). can use string.fromcharcode create values adding buttonvalue - 1 65:

inputfield.setattribute("value", string.fromcharcode(65 + buttonvalue - 1)); // or inputfield.defaultvalue = string.fromcharcode(65 + buttonvalue - 1); // or inputfield.value = string.fromcharcode(65 + buttonvalue - 1); // see below details on .value vs. .defaultvalue

btw, can save fair bit of typing using reflected properties type, id, , class attributes:

inputfield.type = 'text'; inputfield.id = "input-" + buttonvalue; inputfield.classname = 'controls'; //         ^^^^^^^^^ note slightly-different name

(also note +"" unnecessary in id code.)

for value, it's bit complicated:

  • .value = ... sets current value of input, not same thing value attribute
  • the value attribute sets default value of input, not current value.
  • the reflected property value attribute defaultvalue, not value

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