work.suroh.tk/node_modules/nunjucks/samples/express/js/extensions.js

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2019-12-02 12:22:45 +00:00
function RemoteExtension() {
this.tags = ['remote'];
this.parse = function(parser, nodes, lexer) {
// get the tag token
var tok = parser.nextToken();
// parse the args and move after the block end. passing true
// as the second arg is required if there are no parentheses
var args = parser.parseSignature(null, true);
parser.advanceAfterBlockEnd(tok.value);
// parse the body and move after block end
var body = parser.parseUntilBlocks('error', 'endtruncate');
var errorBody = null;
if (parser.skipSymbol('error')) {
parser.skip(lexer.TOKEN_BLOCK_END);
errorBody = parser.parseUntilBlocks('endremote');
}
parser.advanceAfterBlockEnd();
return new nodes.CallExtension(this, 'run', args, [body, errorBody]);
};
this.run = function(context, url, body, errorBody) {
var id = 'el' + Math.floor(Math.random() * 10000);
var ret = new nunjucks.runtime.SafeString('<div id="' + id + '">' + body() + '</div>');
var ajax = new XMLHttpRequest();
ajax.onreadystatechange = function() {
if (ajax.readyState == 4) {
if (ajax.status == 200) {
document.getElementById(id).innerHTML = ajax.responseText;
} else {
document.getElementById(id).innerHTML = errorBody();
}
}
};
ajax.open('GET', url, true);
ajax.send();
return ret;
};
}