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Q&A Setting a cookie with a userscript

@Canina had the brilliant idea to make my userscript reload the page in case the cookie did not exist previously. Using this idea, my userscript now works like this: Greasemonkey version // ==Us...

posted 2y ago by samcarter‭ · edited 2y ago by samcarter‭

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#2: Post edited by

samcarter‭ · 2022-10-12T11:57:37Z (about 2 years ago)

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@Canina had the brilliant idea to make my userscript reload the page in case the cookie did not exist previously.
Using this idea, my userscript now works like this:
```
// ==UserScript==
// @name test
// @match *://example.com/*
// @run-at document-start
// @grant none
// ==/UserScript==
(
function() {
'use strict';
if (document.cookie.indexOf('uuid') == -1 ) {
document.cookie = "uuid=xxx";
location.reload();
}
}
)();
```

@Canina had the brilliant idea to make my userscript reload the page in case the cookie did not exist previously.
Using this idea, my userscript now works like this:
### Greasemonkey version
```
// ==UserScript==
// @name test
// @match *://example.com/*
// @run-at document-start
// @grant none
// ==/UserScript==
(
function() {
'use strict';
if (document.cookie.indexOf('uuid') == -1 ) {
document.cookie = "uuid=xxx";
location.reload();
}
}
)();
```
### Tampermonkey version
```
// ==UserScript==
// @name test
// @description setting cookie
// @version 1.0
// @match https://example.com/*
// @run-at document-start
// @grant GM_cookie
// ==/UserScript==
if (document.cookie.indexOf('uuid') == -1 ) {
GM.cookie.set({ name: 'uuid', value: 'xxx'}, function(error) {
console.log(error || 'Quack');
});
location.reload();
}
```

#1: Initial revision by

samcarter‭ · 2022-10-06T15:43:13Z (about 2 years ago)

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@Canina had the brilliant idea to make my userscript reload the page in case the cookie did not exist previously.

Using this idea, my userscript now works like this:

```
// ==UserScript==
// @name         test
// @match        *://example.com/*
// @run-at       document-start
// @grant        none
// ==/UserScript==

(
  function() {
    'use strict';
    
    if (document.cookie.indexOf('uuid') == -1 ) {
      document.cookie = "uuid=xxx";
      location.reload();
    }    
    
  }
)();
```

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