It's better to use native Sublime Text snippets in your case. If you still want to create Emmet snippet, you should wrap custom text with {}, e.g. {console.log()}.

Emmet snippets are actually aliases for Emmet abbreviations, you define output structure with it

{
"config": {
"html": {
"snippets": {
"cl": "{console.log();}, // it works in html
}
},
"css" : {
"snippets" : {
"cl": "{console.log();}, // it works in css
}
},
"markup" : {
"snippets" : {
"cl": "{console.log();}" // it doesn't work in js (javascript)
}
}
}
}

Not sure what you mean. Emmet doesn't work in JS by default, only in JSX with prefixed mode: https://github.com/emmetio/sublime-text-plugin#jsx-support

OK, thanks.