How to output value in javascript

Methods for outputting values: 1. Use the "window.alert('value')" statement to output through the pop-up window; 2. Use the "element object.innerHtml="output value" statement; 2. Use the "document .write("value")" statement; 4. Use the "console.log("value")" statement.

The operating environment of this tutorial: windows7 system , javascript version 1.8.5, Dell G3 computer.

JavaScript output method

1. Use window .alert()Pop up warning box

<script>
window.alert(&#39;警告框&#39;);
</script>

2. Use element object .innerHtml="value to be written"Write to HTML element

<p id="demo" >我的第一个段落</p>
<script>
document.getElementById("demo").innerHTML="段落已修改"
</scirpt>

• document.getElementById("demo") is the JavaScript code that uses the id attribute to find the HTML element. This method is defined in the HTML DOM.

• innerHTML = "Paragraph changed." is the JavaScript code used to modify the HTML content (innerHTML) of the element.
  

3. Use the document.write() method to write the content into the html document

<script>
document.write(Date());//Date()输出中国标准时间
</script>

Sample：
<button type="button" onclick="myFunction">按钮</buton>
<script>
function myFunction(){
document.write(Date());
}
</scipt>

4. Use console.log() to write to the console of the server

Use F12 in the browser to enable debugging mode, and click the "Console" menu in the debugging window.

<script>
a = 5; 
b = 6; 
c = a + b; 
console.log(c); 
</scipt>

javascript advanced tutorial]

The above is the detailed content of How to output value in javascript. For more information, please follow other related articles on the PHP Chinese website!