In JavaScript, you can remove all elements from an array if they are not text or letter using the Array.filter() method. For example:

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var array = ['#', '!', '@', 'a', '3'];

array = array.filter(item => typeof item === 'string');

console.log(array); // Output: ['a']

The final array only contains the string element a, as all other elements are filtered out due to not being strings.

To make text rows closer in CSS you can use the line-height property. The syntax of the line-height property is as follows:

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line-height: normal|number|length|initial|inherit;

The line-height property specifies the space between the lines of text. The higher the number, the more space will be between the lines. For example, the following code uses a number of 1.2 to reduce the space between text rows:

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p {
  line-height: 1.2;
}

You can also use unitless numbers, em values, or % values when defining the line-height property. For further details, please read this article on line-height from W3Schools.

Relative positioning allows you to position an element relative to its normal position on the page. To move text to the bottom of the page with relative positioning, you can use CSS:

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p {
  position: relative;
  bottom: 0;
}

This will cause the <p> element to move to the bottom of the page and stay there, even if the page is resized.

Reference: CSS Tricks: Absolute Positioning Inside Relative Positioning

span is an inline-level HTML element used to wrap the text content, which allows you to apply styles or attributes to the subset of text without applying them to the entire page.

The basic syntax of a span element is:

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<span>Text content</span>

It can be used together with other HTML tags to achieve the intended effect. For example, the following code wraps a section of <h1> header text in a span:

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<h1>Welcome to <span>SheCodes</span></h1>

For more information, please see the MDN Documentation on Span Elements.

Most HTML elements, by default, are block-level elements. This means they always start on a new line in the document. To make text and images appear on the same line, you need to use an inline display element. In particular, you can use the HTML <span> element, which is an inline element that can be used to group elements for styling purposes.

For example, HTML code such as:

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<p><span>The cat </span><img src="cat.jpg"></p>

Will render with the text to the left of the image:

The cat

If you want to place an image and some text on the same line on an HTML page, you can use the <p> tag with the style attribute set to display:inline-block.

For example:

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<p style="display:inline-block;">
  <img src="img/example.png">
  Some text
</p>

This will display the image and text on the same line.

For further reading, take a look at this tutorial on how to align images side by side.

You can use CSS gradients to style text by using the background-image property. For example:

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h1 {
    background-image: linear-gradient(to right, #00d2ff 0%, #3a7bd5 51%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

This will give your h1 elements a linear gradient from blue to purple, with the text taking on the gradient color.

More information can be found in this tutorial from W3Schools: Using CSS Gradients with Text.

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<h1>Hello World</h1>

The easiest way to make background partially transparent but not the text is by using the opacity css property. You can use the property in the following way:

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.element {
  background: rgba(0, 0, 0, 0.5);  /* partial transparency */
  opacity: 1; /* no transparency on the element, only on its background */
}

This will give the element a background with 50% transparency and the element itself will have no transparency.

You can learn more about this in this CSS Tricks article.

<hr> and <br> tags are used in HTML to create a horizontal line and a single line break, respectively.

The <hr> tag creates a line across the page and has no closing tag.

The <br> tag creates a line break within a block of text, so the text will start on a new line.

For more information: https://www.w3schools.com/html/html_blocks.asp

You can change an HTML element text inside React using setState(). This can be done by calling the function and then setting the new value for HTML elements like h2 as shown in the example below.

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class App extends React.Component {
  constructor(props) {
    super(props);
    this.state = { 
        text: 'Hello world!'
    }
  }

  handleTextChange = () => {
      this.setState({text: 'This is my new text!'});
  }

  render() {
    return (
      <div>
        <h2>{this.state.text}</h2>
        <button onClick={this.handleTextChange}>Change text</button>
      </div>
    )
  }
}

You can read more about this use case in this article.

To align text to the left in a Bootstrap column, you can add the "text-left" class to the column element. For example, in HTML:

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<div class="col-md-4 text-left">
  <p>Text to be aligned to the left.</p>
</div>

More information about Bootstrap's text alignment classes can be found in the Bootstrap documentation.

You can use the d-* classes of Bootstrap 4 to show the text on small devices only. The classes d-none d-md-block will keep the div hidden on all viewports except md and larger (d-* stands for devices and md for medium).

You can also use the responsive Breakpoints for further customization. You can find more information about responsive classes on Bootstrap documentation here.

To select text in JavaScript, you can use the window.getSelection() method. This will create a Selection object which you can then use to set the start and end of the selection and make other modifications. A demo can be found here.

In CSS3, you can specify an opacity on elements such as background but not on text. To achieve the desired effect, you can either wrap each text in a separate container or use a pseudo-element like ::before and ::after to generate a layer behind the text and apply the opacity there. For example:

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div {
    background: rgba(0,0,0,0.5);
}

To make an element with opacity 50% but have the text inside be full opacity you can use the CSS opacity and rgba property, such as:

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.element {
  opacity: 0.5;
  color: rgba(0, 0, 0, 1);
}

This creates an element with 50% opacity while the text inside the element will be fully opaque. More information on rgba and opacity can be found on the MDN Web Docs.

No, a hyperlink can apply to other elements besides text, such as images, charts, icons, etc.