Function minifier::js::replace_tokens_with [−][src]
pub fn replace_tokens_with<'a, 'b: 'a, F: Fn(&Token<'a>) -> Option<Token<'b>>>(
tokens: Tokens<'a>,
callback: F
) -> Tokens<'a>
Expand description
Replace given tokens with others.
Example
extern crate minifier; use minifier::js::{Keyword, Token, replace_tokens_with, simple_minify}; fn main() { let js = r#" function replaceByNull(data, func) { for (var i = 0; i < data.length; ++i) { if func(data[i]) { data[i] = null; } } } }"#.into(); let js_minified = simple_minify(js) .apply(|f| { replace_tokens_with(f, |t| { if *t == Token::Keyword(Keyword::Null) { Some(Token::Other("N")) } else { None } }) }); println!("{}", js_minified.to_string()); }
The previous code will have all its null
keywords replaced with N
. In such cases,
don’t forget to include the definition of N
in the returned minified javascript:
var N = null;