Utilizing JavaScript: Passing a parameter into a function to be used with getElementById()

Implementing a feature that displays statistics by incrementing rapidly until reaching their final value when the element is in view, creating the illusion of a rising number.

Encountering some difficulty in passing the necessary parameters to identify the element to be incremented and determine the final value for determining when to stop the incrementation process.

function increaseValue(elem, finalNum) {

    var currentNum = parseInt(document.getElementById(elem).innerHTML, 10);
    if (currentNum < finalNum) {
        currentNum++;
        document.getElementById(elem).innerHTML = currentNum + "%";

        setTimeout(function() {
            increaseValue(elem, finalNum);
        }, 40);
    }
};

For a comprehensive view, visit the following CodePen link: http://codepen.io/BAWKdesign/pen/yePOGV

javascriptjqueryhtmlcssparameters

Answer №1

Your variable value is not being utilized in any part of the code.

In order for your increment function to work properly, it should be structured like this

function increment(elem, finalVal) {
var currVal = parseInt(document.getElementById(4).innerHTML, 10);
if (currVal < finalVal) {
    currVal++;
    document.getElementById(elem).innerHTML = currVal + "%";
    setTimeout(function() {
        increment(elem, finalVal);
    }, 40);
  }
};

Answer №2

  1. Modify the code by changing value++ to currVal++.
  2. Delete the lines that assign values to elem and finalVal since they are parameters.

Check out the updated codepen link

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