如何在输入框中添加附加值

Question

I'm trying to edit a custom php/JS script input box so a custom suffix is sent with a user inputted value. But so far I haven't managed to succeed.

I need to add ",UK" onto the address variable.

I have tried this

var address = search_form['address'].value + ",UK",

But no luck.

getCurrentLocations: function()
{
    var self = this,
    search_form = document.forms[self.opts.search_form_name],
    address = search_form['address'].value,
    radius = search_form['radius'].value;

I'm just not seeing the address var attaching ",UK"

Answer 1

也许这就是您所需要的？

search_form['address'].value = search_form['address'].value + ", UK";

Answer 2

You need to store old value before appending, then you can create new value in new variable like:

var old_address = search_form['address'].value;
var new_address = old_address + ", UK";

You can also append by using addition assignment operator += like:

var address = search_form['address'].value;
address += ", UK";

Working Example 1:

 var address = "Mike Address"; address += ", UK "; console.log(address); 

Working Example 2:

 var address = "Mike Address"; var new_address = address+", UK "; console.log(new_address);