ngast

Description:

ngast

ngast #




Parser and utilities for AngularDart templates.
Usage #
Currently in development and not stable.
import 'package:ngast/ngast.dart';

main() {
// Create an AST tree by parsing an AngularDart template.
var tree = parse('<button [title]="someTitle">Hello</button>');

// Print to console.
print(tree);

// Output:
// [
// ElementAst <button> {
// properties=
// PropertyAst {
// title="ExpressionAst {someTitle}"}
// childNodes=TextAst {Hello}
// }
// }
// ]
}
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Additional flags can be passed to change the behavior of the parser:



Data type
Name
Description
Default Value




String
sourceUrl
String describing the path of the HTML string.



bool
desugar
Enabled desugaring of banana-syntax, star syntax, and pipes.
true


bool
parseExpressions
Parses Dart expressions raises exceptions if occurred.
true


ExceptionHandler
exceptionHandler
Switch to 'new RecoveringExceptionHandler()' to enable error recovery.
ThrowingExceptionHandler



When using RecoveringExceptionHandler, the accumulated exceptions can be
accessed through the RecoveringExceptionHandler object. Refer to the following
example:
void parse(String content, String sourceUrl) {
var exceptionHandler = new RecoveringExceptionHandler();
var asts = parse(
content,
sourceUrl: sourceUrl,
desugar: false,
parseExpressions: false,
exceptionHandler: exceptionHandler,
);
for (AngularParserException e in exceptionHandler.exceptions) {
// Do something with exception.
}
}
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