Difference between revisions of "JS.eval"
From GiderosMobile
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(removed language stuff and added example from sinistersoft) |
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__NOTOC__ | __NOTOC__ | ||
| − | + | '''Available since:''' Gideros 2016.10<br/> | |
| − | ''' | + | '''Class:''' [[JS]]<br/> |
| − | ''' | ||
| − | === | + | === Description === |
| − | + | Executes arbitrary JavaScript code on HTML5 platform. | |
<source lang="lua"> | <source lang="lua"> | ||
JS.eval(code) | JS.eval(code) | ||
</source> | </source> | ||
| − | === | + | === Parameters === |
| − | '''code''': (string) | + | '''code''': (string) JavaScript code to execute<br/> |
| + | |||
| + | === Example === | ||
| + | '''Sometimes you may not want the user to leave the game without giving a warning that they will lose information, here is code that will allow you to do this on html5 exports:''' | ||
| + | <source lang="lua"> | ||
| + | if JS then | ||
| + | JS.eval([[ | ||
| + | window.saveWarning=false; | ||
| + | window.saveWarningListener = (e) => { | ||
| + | if (window.saveWarning==true) { | ||
| + | e.preventDefault(); | ||
| + | e.returnValue=''; | ||
| + | } | ||
| + | }; | ||
| + | window.addEventListener('beforeunload', saveWarningListener); | ||
| + | ]]) | ||
| + | end | ||
| + | |||
| + | function saveWarning(f) | ||
| + | if JS then | ||
| + | if f then JS.eval("window.saveWarning=true;") | ||
| + | else JS.eval("window.saveWarning=false;") | ||
| + | end | ||
| + | end | ||
| + | end | ||
| + | </source> | ||
{{JS}} | {{JS}} | ||
Revision as of 04:26, 8 September 2021
Available since: Gideros 2016.10
Class: JS
Description
Executes arbitrary JavaScript code on HTML5 platform.
JS.eval(code)
Parameters
code: (string) JavaScript code to execute
Example
Sometimes you may not want the user to leave the game without giving a warning that they will lose information, here is code that will allow you to do this on html5 exports:
if JS then
JS.eval([[
window.saveWarning=false;
window.saveWarningListener = (e) => {
if (window.saveWarning==true) {
e.preventDefault();
e.returnValue='';
}
};
window.addEventListener('beforeunload', saveWarningListener);
]])
end
function saveWarning(f)
if JS then
if f then JS.eval("window.saveWarning=true;")
else JS.eval("window.saveWarning=false;")
end
end
end
