[英]how to insert a picture using clear javascript?
Schematically what I want.示意性地我想要什么。 How to do it?
怎么做?
<img src=incamingMessage>
<script>
var socket = new WebSocket("ws://localhost:9090/");
socket.onmessage = function(event) {
var incomingMessage = event.data;
insertPic(incomingMessage);
};
function insertPic(message) {
//here something that change <img>
};
//event.data = "img/312.png"
</script>
update added listener.更新添加的侦听器。 i dont know how to change arg in img
我不知道如何更改 img 中的 arg
At first, who is event.data
?首先,谁是
event.data
? What data type?什么数据类型? What kind of variable?
什么样的变量? Where is it defined?
它在哪里定义? Is it an array of bytes?
它是一个字节数组吗? is it a
var
?是
var
吗?
What you do is probably better doable with PHP like this:你所做的可能更适合 PHP 这样的:
<?php
$incomingMessage = // populate with the actual data from your source.
echo '<img src="'.incomingMessage'">';
?>
As for Javascript, I have no idea what to tell you because you did not provide any info about the source of the data, the variable that stores it, etc.至于Javascript,我不知道该告诉你什么,因为你没有提供任何关于数据来源、存储数据的变量等信息。
document.getElementById(id).src = incomingMessage; document.getElementById(id).src = incomingMessage; that what i wanted to know
那是我想知道的
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