1. alert("Content to be output");
->Pop up a dialog box in the browser and display the content to be output.
->alert first converts the content to be output into a string and then outputs it
2, document.write("Content to be output");
->Display the output content directly on the page
3. console.log("Content to be output");
->Output the content on the console
4. value ->Assign value content to the text box (form element)
->Get the content of the text box (form element)
document.getElementById("search").value = "要给#search这个文本框添加的内容";
5. innerHTML/innerText ->Assign value content to labels other than form elements
document.getElementById("div1").innerHTML = "吧啦吧啦吧啦吧啦"; document.getElementById("div1").innerText = "吧啦吧啦吧啦吧啦";
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