What is the best way to format changing text within a paragraph?

Question

What is the best way to format changing text within a paragraph?

If I needed to implement this functionality using JavaScript:

......
if (!isNaN(num))
    document.getElementById("isNum").innerHTML = num +" is a number";
......

Then in HTML :

<div>
    <button onclick="checknum()">Enter any value : </button>
    <p id="isNum"></p>  
</div>

The expected output (for input "3"):

3 is a number

The query being posed is:

How can I highlight, perhaps via CSS, the variable within Javascript to display the output as follows:

3 is a number

javascript html css

Answer 1

Answer №1

To enhance the appearance of your number, consider enclosing it in a span:

document.getElementById("isNum").innerHTML = '<span>' + num + "</span> is a number";

You can then apply a specific CSS style to this span within the paragraph with the id #isNum:

#isNum span{
    font-weight: bold;
    color: green;
}

We hope this solution proves helpful.

var num = 3;

if (!isNaN(num))
    document.getElementById("isNum").innerHTML = '<span>'+num+"</span> is a number";

#isNum span{
    font-weight: bold;
    color: green;
}

<div>
    <p id="isNum"></p>  
</div>

Answer 2

To enhance the appearance of your number, consider enclosing it in a span:

document.getElementById("isNum").innerHTML = '<span>' + num + "</span> is a number";

You can then apply a specific CSS style to this span within the paragraph with the id #isNum:

#isNum span{
    font-weight: bold;
    color: green;
}

We hope this solution proves helpful.

var num = 3;

if (!isNaN(num))
    document.getElementById("isNum").innerHTML = '<span>'+num+"</span> is a number";

#isNum span{
    font-weight: bold;
    color: green;
}

<div>
    <p id="isNum"></p>  
</div>

Answer 3

Answer №2

It would be more suitable to emphasize the input using  in this scenario.

<p id="isNum"><em>3</em> is a Number</p>

Below is a sample code snippet (hopefully, it is easy to understand).

The concept is to enclose the value that needs emphasis within an inline element (such as span or em).

Keep in mind that , i, or  elements can also achieve similar results.

function checknum() {

  // Reference the `output` element
  var outputElement = document.querySelector("#isNum");

  // Retrieve the input value 
  var num = document.querySelector("#numValue").value;

  // Check: do we have a value and is it a number?
  var isNumber = num.length > 0 && !isNaN(num);

  // Format the HTML string for outputting
  // Wrap the value inside an inline element for separate styling
  var outputHTML = "<em>" + num + "</em>";

  // Output result
  outputElement.innerHTML = isNumber ?
    outputHTML + " is a number" :
    "Not valid";
}

#isNum > em {
  color: blue;
}
#isNum > span {
  /* if using span */
  font-weight: bold;
  font-style: italic;
  color: blue;
}

<div>
  <input type="text" id="numValue" />
  <button onclick="checknum()">Insert anything</button>
  <p id="isNum"></p>
</div>

Answer 4

It would be more suitable to emphasize the input using  in this scenario.

<p id="isNum"><em>3</em> is a Number</p>

Below is a sample code snippet (hopefully, it is easy to understand).

The concept is to enclose the value that needs emphasis within an inline element (such as span or em).

Keep in mind that , i, or  elements can also achieve similar results.

function checknum() {

  // Reference the `output` element
  var outputElement = document.querySelector("#isNum");

  // Retrieve the input value 
  var num = document.querySelector("#numValue").value;

  // Check: do we have a value and is it a number?
  var isNumber = num.length > 0 && !isNaN(num);

  // Format the HTML string for outputting
  // Wrap the value inside an inline element for separate styling
  var outputHTML = "<em>" + num + "</em>";

  // Output result
  outputElement.innerHTML = isNumber ?
    outputHTML + " is a number" :
    "Not valid";
}

#isNum > em {
  color: blue;
}
#isNum > span {
  /* if using span */
  font-weight: bold;
  font-style: italic;
  color: blue;
}

<div>
  <input type="text" id="numValue" />
  <button onclick="checknum()">Insert anything</button>
  <p id="isNum"></p>
</div>

Answer 5

Answer №3

document.getElementById("isNum").innerHTML = "<span style='color: blue;'>" + num +"</span> is a digit";

Alternatively (and this is often seen as a more recommended approach) you could assign a class to the span element instead of using inline styling. Then, specify the color for that class in your CSS file.

JavaScript:

innerHTML = "<span class='digit'>" + num +"</span> is a number";

CSS:

.digit { color: blue; }

Answer 6

document.getElementById("isNum").innerHTML = "<span style='color: blue;'>" + num +"</span> is a digit";

Alternatively (and this is often seen as a more recommended approach) you could assign a class to the span element instead of using inline styling. Then, specify the color for that class in your CSS file.

JavaScript:

innerHTML = "<span class='digit'>" + num +"</span> is a number";

CSS:

.digit { color: blue; }

Answer 7

Answer №4

Give this a shot:


   if (num && typeof num === 'number')
    document.getElementById("isNumber").innerHTML = '<span class="highlight">' + num +"</span> is indeed a number";

Answer 8

Give this a shot:


   if (num && typeof num === 'number')
    document.getElementById("isNumber").innerHTML = '<span class="highlight">' + num +"</span> is indeed a number";

Answer 9

Answer №5

To display the number in HTML, you must enclose it with a certain element

Imagine that this is how the HTML appears on the page

<p id="isNum"><span class="num-color"> 1</span> represents a color</p>

next, apply some CSS

.num-color {
 color: yellow;
}

If you want to see the mentioned HTML output, adjust your JavaScript code as follows:

document.getElementById("isNum").innerHTML = '<span class="num-color">' + num + '</span>' +' represents a number';

Answer 10

To display the number in HTML, you must enclose it with a certain element

Imagine that this is how the HTML appears on the page

<p id="isNum"><span class="num-color"> 1</span> represents a color</p>

next, apply some CSS

.num-color {
 color: yellow;
}

If you want to see the mentioned HTML output, adjust your JavaScript code as follows:

document.getElementById("isNum").innerHTML = '<span class="num-color">' + num + '</span>' +' represents a number';

Answer 11

Answer №6

Just insert an element

element.innerHTML = "<span class='blue'>" + num +"</span> represents a numerical value";

Then, modify the styling of that class

function validateNumber() {
  var num  = prompt('Please enter a number');
  var element = document.getElementById("isNum");
  
  if (!isNaN(num))
    element.innerHTML = "<span class='red'>" + num + "</span> is a number";
}

.red {color : red}

<div>
    <button onclick="validateNumber()">Enter a number: </button>
    <p id="isNum"></p>  
</div>

Answer 12

Just insert an element

element.innerHTML = "<span class='blue'>" + num +"</span> represents a numerical value";

Then, modify the styling of that class

function validateNumber() {
  var num  = prompt('Please enter a number');
  var element = document.getElementById("isNum");
  
  if (!isNaN(num))
    element.innerHTML = "<span class='red'>" + num + "</span> is a number";
}

.red {color : red}

<div>
    <button onclick="validateNumber()">Enter a number: </button>
    <p id="isNum"></p>  
</div>

What is the best way to format changing text within a paragraph?

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

Answer №6

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