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Transform Translate CSS

The transform:translate(-50%, -50%) property is a CSS function that repositions an element in the horizontal and/or vertical directions. It takes two values: the x and y components of the translation vector. The x component is negative because it moves the element to the left, and the y component is negative because it moves the element down. So, transform:translate(-50%, -50%) means moving the element 50% of its original width to the left and 50% of its original height down.

You can use this property to move an element relative to its current position, or relative to another element’s position. For example, if you have a <div> element with a width of 100px and a height of 100px, and you apply transform:translate(-50%, -50%) to it, it will move 50px to the left and 50px down from its original position. If you apply it to another <div> element that has a width of 200px and a height of 200px, and you apply transform:translate(-50%, -50%) to it, it will move 100px to the left and 100px down from its original position.

You can also use this property in combination with other CSS functions, such as transform:rotate() or transform:scale(), to create more complex transformations. For example, if you want to rotate an element by 90 degrees around its center, you can use transform:rotate(90deg), but if you want to move it first by 50% of its original width to the left and then rotate it by 90 degrees around its center, you can use transform:translate(-50%, -50%) rotate(90deg).

I hope this helps you understand what transform:translate(-50%, -50%) does.

Example using translateX(-50%) https://tpvncode.blogspot.com/2023/09/how-to-center-balloon-using-html-css.html