How to implement multiplexing and parameter passing in SVG text animation?

Flexible reuse and dynamic parameter control of SVG text animation

SVG has significant advantages in creating animations and graphics, and use tag can effectively reuse defined graphics elements, improving code efficiency and maintainability. However, when SVG text elements need to be reused and the text content needs to be dynamically changed, simple use tags appear to be inflexible. This article will explore how to achieve dynamic update and efficient reuse of text content in SVG.

It is very efficient to use the use tag to reuse the SVG element directly, but it copies the element itself, not its attribute value. Therefore, when the text content needs to be modified, use tag cannot directly meet the needs.

In order to achieve dynamic changes and reuse of text content, we can combine JavaScript and SVG's textContent attributes. First, define a literal element in SVG, for example:

<text font-size="16" id="myText" x="10" y="20"> Initial text</text>

Then, use JavaScript to get the element and modify its textContent property:

 let textElement = document.getElementById("myText");
textElement.textContent = "New text content";

By modifying textContent property, the content of the SVG text element can be changed dynamically. In order to achieve reuse, we can encapsulate this JavaScript code into a function and pass different text content as parameters:

 function updateSvgText(textId, newText) {
  let textElement = document.getElementById(textId);
  if (textElement) {
    textElement.textContent = newText;
  }
}

updateSvgText("myText", "text one");
updateSvgText("myText", "text two");
updateSvgText("myText", "text three");

By calling this function and passing in different textId and newText parameters, different SVG text element content can be updated to achieve dynamic content update and efficient reuse. textId must be consistent with id attribute of the literal element defined in SVG. When multiple different literal elements are required, a unique id attribute needs to be defined for each element.

This method avoids direct copying of SVG elements, improves the maintainability and efficiency of the code, and allows flexible control of the display content of each SVG text element.

The above is the detailed content of How to implement multiplexing and parameter passing in SVG text animation?. For more information, please follow other related articles on the PHP Chinese website!