How to set each line of text to the same string in javascript

JavaScript is a commonly used programming language that is often used to develop web pages and website applications. In this article, we will introduce how to use JavaScript to set each line of text to the same string, making your text more beautiful and orderly.

In daily life, many times we need to format multiple lines of text according to the same rules. For example, in some websites and applications we often see, all titles, authors, dates and other information will be left or center aligned, which can make the page look more orderly and tidy. If you don't know how to implement this functionality, you can do it using JavaScript.

First, we need to prepare our own text. We can add a div tag containing multiple lines of content to an HTML page, as shown below:

<div id="text">
  <p>第一行文字</p>
  <p>第二行文字</p>
  <p>第三行文字</p>
  <p>第四行文字</p>
  <p>第五行文字</p>
</div>

Here we use p tags to represent each line of text, and add these p tags as child elements to a In the div tag with the id "text".

Next we need to use JavaScript to set each line of text. We can first get the reference to the div tag through the getElementById method, and then get all the child elements it contains through its childNodes attribute, that is, the p tag corresponding to each line of text. The code is as follows:

var textDiv = document.getElementById("text");
var textNodes = textDiv.childNodes;

Then we can iterate through each tag and replace their text content with the same string. During this process, we need to pay attention to spaces and newlines. If these spaces and newlines are not processed, the final result may be misaligned. So we need to use the trim() method to remove spaces and newlines before and after the string. The code is as follows:

for(var i=0; i<textNodes.length; i++) {
  var text = textNodes[i].textContent.trim();
  textNodes[i].textContent = "设置的字符串" + text;
}

In this example, we use the textContent attribute to get the text content contained in each p tag, and then use the .trim() method to trim the leading and trailing spaces and newline characters of the text Remove. Finally, each line of text is modified into the form of "set string" text by modifying the textContent attribute.

Finally, we can see on the page that each line of text follows the same string. This string can be set according to requirements, for example, you can set it to "-", "|" or other symbols. If you want to style the line text, you can also add the corresponding style settings in the JavaScript code.

In this article, we introduced how to use JavaScript to set each line of text to the same string. Through the above code implementation, we can make our text more orderly and beautiful. If you want to know more about JavaScript, you can go to relevant websites and books to find relevant information.

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