Another option instead of using `overflow: hidden` that won't cut off part of a character

Question

Another option instead of using `overflow: hidden` that won't cut off part of a character

My calculator display limits the numbers shown using the CSS property overflow: hidden. However, I don't want it to clip characters in half, which is currently happening.

Mozilla suggests using text-overflow: '';, but this isn't widely supported across browsers. Do you have any alternative suggestions on how to limit the number of characters and clip between characters instead of cutting them off mid-character? (I prefer not to see incomplete numbers on the display)

I'm specifically looking for JavaScript solutions.

Below is my current solution, which only works when inputting numbers and not operators:

  // JavaScript code here

.container {
    /* CSS styles here */
  }
  .wrapper {
    /* More CSS styles here */
  }
  /* Additional CSS rules */

<div class="container">
  <div class="wrapper">
    <!-- Calculator HTML structure -->
  </div>
</div>

javascript css overflow hidden clipping

Answer 1

Answer №1

If you're dealing with extremely large numbers, you can utilize a combination of a rounding algorithm and exponential notation for their display:

Here is a function that handles the result display:

/**
 * This function uses a specific rounding algorithm to prevent overflow issues with float numbers.
 * If the number exceeds or equals 1e+8, it returns a string representation in exponential form.
 */
function handleResultDisplay(number) {
  number = roundNumber(number, 3);
  return (number >= 1e+8) ? number.toExponential(3) : number;
}

The rounding algorithm in use: [1]

/**
 * An algorithm designed to counter JavaScript's inherent rounding errors.
 * @param  {Number}  num    the number requiring rounding
 * @param  {Number}  scale  the desired number of decimal places
 */
function roundNumber(num, scale) {
  var roundedNum = Math.round(num * Math.pow(10, scale)) / Math.pow(10, scale);
  if (num - roundedNum > 0) {
    return (roundedNum + Math.floor(2 * Math.round((num - roundedNum) * Math.pow(10, (scale + 1))) / 10) / Math.pow(10, scale));
  } else {
    return roundedNum;
  }
}

[1] This algorithm is based on my interpretation of Kunin's answer: Rounding to a Maximum of 2 Decimal Places.

Answer 2

If you're dealing with extremely large numbers, you can utilize a combination of a rounding algorithm and exponential notation for their display:

Here is a function that handles the result display:

/**
 * This function uses a specific rounding algorithm to prevent overflow issues with float numbers.
 * If the number exceeds or equals 1e+8, it returns a string representation in exponential form.
 */
function handleResultDisplay(number) {
  number = roundNumber(number, 3);
  return (number >= 1e+8) ? number.toExponential(3) : number;
}

The rounding algorithm in use: [1]

/**
 * An algorithm designed to counter JavaScript's inherent rounding errors.
 * @param  {Number}  num    the number requiring rounding
 * @param  {Number}  scale  the desired number of decimal places
 */
function roundNumber(num, scale) {
  var roundedNum = Math.round(num * Math.pow(10, scale)) / Math.pow(10, scale);
  if (num - roundedNum > 0) {
    return (roundedNum + Math.floor(2 * Math.round((num - roundedNum) * Math.pow(10, (scale + 1))) / 10) / Math.pow(10, scale));
  } else {
    return roundedNum;
  }
}

[1] This algorithm is based on my interpretation of Kunin's answer: Rounding to a Maximum of 2 Decimal Places.

Answer 3

Answer №2

While I understand your preference for JavaScript solutions, there is a more elegant approach using CSS that also maintains the original number for future calculations. Since you have not provided a code snippet, I will assume that your calculator displays the number on a single line.

Here is the solution, assuming the number is displayed with the class .number:

.number {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

By implementing this CSS, the number will be truncated with an ellipsis (...) if it exceeds the space available. For example, it will look like this:

123.486593845674...

This solution is supported by all modern browsers (including IE11 and newer versions).

Answer 4

While I understand your preference for JavaScript solutions, there is a more elegant approach using CSS that also maintains the original number for future calculations. Since you have not provided a code snippet, I will assume that your calculator displays the number on a single line.

Here is the solution, assuming the number is displayed with the class .number:

.number {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

By implementing this CSS, the number will be truncated with an ellipsis (...) if it exceeds the space available. For example, it will look like this:

123.486593845674...

This solution is supported by all modern browsers (including IE11 and newer versions).

Another option instead of using `overflow: hidden` that won't cut off part of a character

Answer №1

Answer №2

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