This is not a bug as David said.
To expand a little more about why this happens. String.prototype.startsWith is
not part of ES3 or ES5. Only with ES6 will it become standard. The default
language level for the closure compiler is ES3 which is why it doesn't know
startsWith.
You can check the default externs of the closure-compiler [1] and a quick
search reveals all supported functions for each type. For String we have:
ag String.prototype
es5.js
44:String.prototype.trim = function() {};
53:String.prototype.trimLeft = function() {};
62:String.prototype.trimRight = function() {};
es6.js
257:String.prototype.repeat = function(count) {};
280:String.prototype.codePointAt = function(index) {};
288:String.prototype.normalize = function(opt_form) {};
298:String.prototype.startsWith = function(searchString, opt_position) {};
307:String.prototype.endsWith = function(searchString, opt_position) {};
316:String.prototype.includes = function(searchString, opt_position) {};
es3.js
1565:String.prototype.anchor = function() {};
1573:String.prototype.big = function() {};
1581:String.prototype.blink = function() {};
1589:String.prototype.bold = function() {};
1600:String.prototype.charAt = function(index) {};
1612:String.prototype.charCodeAt = function(opt_index) {};
1623:String.prototype.concat = function(var_args) {};
1631:String.prototype.fixed = function() {};
1640:String.prototype.fontcolor = function(color) {};
1649:String.prototype.fontsize = function(size) {};
1663:String.prototype.indexOf = function(searchValue, opt_fromIndex) {};
1671:String.prototype.italics = function() {};
1685:String.prototype.lastIndexOf = function(searchValue, opt_fromIndex) {};
1694:String.prototype.link = function(hrefAttribute) {};
1709:String.prototype.localeCompare = function(compareString, locales, options)
{};
1722:String.prototype.match = function(regexp) {};
1730:String.prototype.quote = function() {};
1745:String.prototype.replace = function(regex, str, opt_flags) {};
1756:String.prototype.search = function(regexp) {};
1766:String.prototype.slice = function(begin, opt_end) {};
1774:String.prototype.small = function() {};
1784:String.prototype.split = function(opt_separator, opt_limit) {};
1791:String.prototype.strike = function() {};
1799:String.prototype.sub = function() {};
1809:String.prototype.substr = function(start, opt_length) {};
1819:String.prototype.substring = function(start, opt_end) {};
1827:String.prototype.sup = function() {};
1835:String.prototype.toLocaleUpperCase = function() {};
1843:String.prototype.toLocaleLowerCase = function() {};
1851:String.prototype.toLowerCase = function() {};
1859:String.prototype.toUpperCase = function() {};
1867:String.prototype.toSource = function() {};
1875:String.prototype.toString = function() {};
1882:String.prototype.valueOf;
1888:String.prototype.length;
When in doubt, look at the externs.
HTH,
/thomas
[1] https://github.com/google/closure-compiler/tree/master/externs
On Wednesday, September 2, 2015 at 3:48:17 PM UTC+2, Felipe Gerard wrote:
> This is a minimal project to show the issue, the code breaks when using
> :advanced optimization, .startsWith breaks:
>
> cljs code:
> **************************************************
>
> (ns minimal.core)
>
> (let [elem (.getElementById js/document "app")]
> (set! (.-innerHTML elem) (str "Hello Worls " (.startsWith "Hello" "H"))))
>
> **************************************************
>
> project.clj:
> **************************************************
>
> (defproject minimal "0.1.0-SNAPSHOT"
> :description "FIXME: write description"
> :url "http://example.com/FIXME";
> :license {:name "Eclipse Public License"
> :url "http://www.eclipse.org/legal/epl-v10.html"}
> :dependencies [[org.clojure/clojure "1.7.0"]
> [org.clojure/clojurescript "1.7.48"]]
>
> :plugins [[lein-cljsbuild "1.0.6"]]
>
> :source-paths ["src"]
>
> :cljsbuild {:builds [{:id "dev"
> :source-paths ["src"]
> :compiler {:output-to
> "resources/public/js/components.js"
> :output-dir "resources/public/js/out"
> :main minimal.core
> :asset-path "js/out"
> :optimizations :none
> :cache-analysis true
> :source-map true
> }}
> {:id "prod"
> :source-paths ["src"]
> :compiler {:output-to
> "resources/public/js/components.min.js"
> :main minimal.core
> :optimizations :advanced
> :pretty-print false}}]}
> **************************************************
>
> index.html (this works with code not optimized)
> <!DOCTYPE html>
> <html lang="en">
> <head>
> <meta charset="utf-8">
> <meta http-equiv="X-UA-Compatible" content="IE=edge">
> <meta name="viewport" content="width=device-width, initial-scale=1">
> <title>>Test Minimal</title>
> </head>
>
> <body>
> <main role="main">
> <section id="app"> </section>
> </main>
>
> <script src="js/components.js" type="text/javascript"></script>
>
> </body>
> </html>
>
> index-prod.html this does not work wit optimized js
> <!DOCTYPE html>
> <html lang="en">
> <head>
> <meta charset="utf-8">
> <meta http-equiv="X-UA-Compatible" content="IE=edge">
> <meta name="viewport" content="width=device-width, initial-scale=1">
> <title>>Test Minomal</title>
> </head>
>
> <body>
> <main role="main">
> <section id="app"> </section>
> </main>
>
> <script src="js/components.min.js" type="text/javascript"></script>
>
> </body>
> </html>
>
> Any ideas? or this is a true bug.
--
Note that posts from new members are moderated - please be patient with your
first post.
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