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嗨,我是新来的网页开发,我试图与Cytoscape.js玩。我决定使用Node.js,Express和Express-handlebars来运行我的网页。我想使用Cytoscape.js来显示一个图表,但我不知道如何使用句柄来获取容器的引用来初始化cytoscape对象。 这是我的main.handlebars文件:与Cytoscape.js使用快速句柄
<!doctype html>
<html>
<head>
<title>Hello Cytoscape</title>
</head>
<body>
{{{body}}}
</body>
</html>
这是我的home.handlebars文件:
<div id="cy"></div>
这是我的.js文件:
/**
*
*/
'use strict';
var express = require('express');
var app = express();
var cytoscape = require('cytoscape');
//layout defaults to main, located in the views layout folder
var handlebars = require('express-handlebars').create({defaultLayout:'main'});
app.use(express.static('public'));
//sets the template engine to use for the express object
//a template engine will implement the view part of the app
app.engine('handlebars', handlebars.engine);
app.set('view engine', 'handlebars');
//initialize the cytoscape object
var cy = cytoscape({
//<----not sure how to do this----->
container: document.getElementById('cy'), // container to render in
elements: [ // list of graph elements to start with
{ // node a
data: { id: 'a' }
},
{ // node b
data: { id: 'b' }
},
{ // edge ab
data: { id: 'ab', source: 'a', target: 'b' }
}
],
style: [ // the stylesheet for the graph
{
selector: 'node',
style: {
'background-color': '#666',
'label': 'data(id)'
}
},
{
selector: 'edge',
style: {
'width': 3,
'line-color': '#ccc',
'target-arrow-color': '#ccc',
'target-arrow-shape': 'triangle'
}
}
],
layout: {
name: 'grid',
rows: 1
},
// initial viewport state:
zoom: 1,
pan: { x: 0, y: 0 },
// interaction options:
minZoom: 1e-50,
maxZoom: 1e50,
zoomingEnabled: true,
userZoomingEnabled: true,
panningEnabled: true,
userPanningEnabled: true,
boxSelectionEnabled: false,
selectionType: 'single',
touchTapThreshold: 8,
desktopTapThreshold: 4,
autolock: false,
autoungrabify: false,
autounselectify: false,
// rendering options:
headless: false,
styleEnabled: true,
hideEdgesOnViewport: false,
hideLabelsOnViewport: false,
textureOnViewport: false,
motionBlur: false,
motionBlurOpacity: 0.2,
wheelSensitivity: 1,
pixelRatio: 'auto'
});
app.get('/', function (req, res) {
var context = {};
res.render('home', context);
});
//listener all for unrecognized urls
//return 404 not found response
app.use(function(req,res){
res.status(404);
res.render('404');
});
//listener for errors generate on server
//return 500 response
app.use(function(err, req, res, next){
console.error(err.stack);
res.type('plain/text');
res.status(500);
res.render('500');
});
if (module === require.main) {
// [START server]
// Start the server
var server = app.listen(process.env.PORT || 8080, function() {
var port = server.address().port;
console.log('App listening on port %s', port);
});
// [END server]
}
module.exports = app;
所以我想我的问题是怎么做的我得到了对div容器id =“cy”的引用,以便使用express-handlebars初始化我的Cytoscape.js图形,在此先感谢任何帮助。