How to write variables in JavaScript variable substitutions

Sorry for the rudimentary question.

I would like to send and receive values between html files, but there are various restrictions and I can't use webstorage and cookies, so I decided to attach parameters when linking.
When sending parameters
I want to send a value named A and a value named B

Set the value of A to vara;
The value of B is var B;
The result of pressing the radio button is defined in the if statement and the value has been substituted.

var prom="A="+a+"&B="+b;
(I don't understand the code above.)

<a href="〇 h.html?+pram";>

Once executed, the receiver html can simply retrieve the string pram.

Please let me know how to write it.

javascript html

2022-09-30 16:29

1 Answers

JavaScript code only applies to the following parts of an HTML document:

<script>In-tag/<script>linked external resources

on

onclick
If the attribute value for the URL starts with javascript:

Other than these, JavaScript variables cannot be written. The href attribute in the a element is for URLs, but you cannot write variables because it does not start with javascript:.

You must change the href using DOM.Modify the attribute values as follows, making it easy to see from the code, such as adding an id to the desired a element:

<aid=foobar>
<script>
varprom="A="+a+"&B="+b;
document.getElementById('foobar').setAttribute('href', '〇 ..html?'+prom);
</script>

2022-09-30 16:29

If you have any answers or tips

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