Javascript Sum function return NaN

Question

function increase( y) {
    var x = document.getElementById("result");
    var before= x.value;
    x.innerHTML= Number(before) + Number(y);
}

<b>Rp. <b id='result'>1240000</b> </b>
<button type="button" onclick="increase(80000)"> add </button>

A `` element doesn't have a `.value`. Use `innerText`. – Ivar Jul 30 '20 at 10:14 — Ivar, Jul 30 '20 at 10:14
it works https://jsfiddle.net/b0kd26oa/ – Asutosh Jul 30 '20 at 10:15 — Asutosh, Jul 30 '20 at 10:15

score 0 · Accepted Answer · answered Jul 30 '20 at 10:15

You have to use innerHTML to get the value of <b>.

function increase( y) {
  var x = document.getElementById("result");
  x.innerHTML= parseInt(x.innerHTML) + parseInt(y);
}

<b>Rp. <b id="result">1240000</b> </b>
<button type="button" onclick="increase(80000)"> add </button>

1 Answers1