Question 52074 in Javascript Question posted in
A very good W3school tutorial can be found here.

Multiline string in Javascript function call (Firefox user.js)

I have a user.js file which sets user_prefs() for the new tab page in firefox. When I have the function call on a single line with escaped quotes, it works fine, but when the parameter is a multi-line string it doesn’t work. Any ideas how I can have this work as a multiline string (for readability)?

Works:


user_pref("browser.newtabpage.pinned", "[{"url":"https://amazon.com/","label":"amazon","baseDomain":"amazon.com"},{"url":"https://mail.google.com/mail/u/0/#inbox","label":"mail"},{"url":"https://www.facebook.com/","label":"facebook","baseDomain":"facebook.com"},{"url":"https://twitter.com/","label":"twitter","baseDomain":"twitter.com"},{"url":"https://www.instagram.com/","label":"instagram","baseDomain":"instagram.com"},{"url":"https://www.reddit.com/","label":"reddit","baseDomain":"reddit.com"},{"url":"https://www.youtube.com/","label":"youtube","baseDomain":"youtube.com"},{"url":"https://keep.google.com/","label":"keep.google","baseDomain":"keep.google.com"},{"url":"https://app.plex.tv/desktop/#!/","label":"app.plex","baseDomain":"app.plex.tv"},{"url":"https://www.phoronix.com/scan.php?page=home","baseDomain":"phoronix.com"},{"url":"http://192.168.50.2","label":"nas","baseDomain":"192.168.50.2"},{"url":"http://192.168.50.2:8080","label":"app","baseDomain":"192.168.50.2"},{"url":"https://www.protondb.com/","label":"proton","baseDomain":"protondb.com"}]");

Doesn’t work:

user_pref("browser.newtabpage.pinned",
`[
    {
        "url": "https://amazon.com/",
        "label": "amazon",
        "baseDomain": "amazon.com"
    },
    {
        "url": "https://mail.google.com/mail/u/0/#inbox",
        "label": "mail"
    },
    {
        "url": "https://www.facebook.com/",
        "label": "facebook",
        "baseDomain": "facebook.com"
    },
    {
        "url": "https://twitter.com/",
        "label": "twitter",
        "baseDomain": "twitter.com"
    },
    {
        "url": "https://www.instagram.com/",
        "label": "instagram",
        "baseDomain": "instagram.com"
    },
    {
        "url": "https://www.reddit.com/",
        "label": "reddit",
        "baseDomain": "reddit.com"
    },
    {
        "url": "https://www.youtube.com/",
        "label": "youtube",
        "baseDomain": "youtube.com"
    },
    {
        "url": "https://keep.google.com/",
        "label": "keep.google",
        "baseDomain": "keep.google.com"
    },
    {
        "url": "https://app.plex.tv/desktop/#!/",
        "label": "app.plex",
        "baseDomain": "app.plex.tv"
    },
    {
        "url": "https://www.phoronix.com/scan.php?page=home",
        "baseDomain": "phoronix.com"
    },
    {
        "url": "http://192.168.50.2",
        "label": "nas",
        "baseDomain": "192.168.50.2"
    },
    {
        "url": "http://192.168.50.2:8080",
        "label": "app",
        "baseDomain": "192.168.50.2"
    },
    {
        "url": "https://www.protondb.com/",
        "label": "proton",
        "baseDomain": "protondb.com"
    },
    {
        "url": "http://lichess.org",
        "label": "lichess",
        "baseDomain": "lichess.org"
    },
    {
        "url": "https://app.ynab.com",
        "label": "ynab",
        "baseDomain": "app.ynab.com"
    }
]`);
Tags:

2

Answers


  1. 0

    Use JSON.parse to convert in to object (or even write is as object) and then JSON.stringify to convert it back to exactly the string it expects

    user_pref(
   "browser.newtabpage.pinned",
   JSON.stringify(
       { blah: 999 }
   )
)
    Login or Signup to reply.
  2. 0

    It seems that the user.js uses a limiter parser, so I guess template string just don’t work there

    Try using basic strings with newline escapes, like

    user_pref('browser.newtabpage.pinned',
'[                                       
    {                                    
        "url": "https://amazon.com/",    
        "label": "amazon",               
        "baseDomain": "amazon.com"       
    },                                   
    {                                    
        "url": "https://app.ynab.com",   
        "label": "ynab",                 
        "baseDomain": "app.ynab.com"     
    }                                    
');

    (note that I use ‘ strings to avoid " escapes)

    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search