I have a pretty large object that I need to pass to a function in a client script. I have tried using JSON.stringify, but have run into a few issues with this approach - mostly performance related. Is it possible to do something like this in ejs?
app.get('/load', function(req, res) {
var data = {
layout:'interview/load',
locals: {
interview: '',
data: someLargeObj
}
};
res.render('load', data);
});
And in my client script, I would pass this object to a function like so
<script type="text/javascript">
load(<%- data %>); // load is a function in a client script
</script>
When I try this I get either
<script type="text/javascript">
load();
</script>
or
<script type="text/javascript">
load([Object object]);
</script>
In Node.js:
res.render('mytemplate', {data: myobject});
In EJS:
<script type='text/javascript'>
var rows =<%-JSON.stringify(data)%>
</script>
That is the expected behavior. Your template engine is trying to create a string from your object which leads to [Object object]. If you really want to pass data like that I think you did the correct thing by stringifying the object.
Think there's a much better way when passing an object to the ejs , you dont have to deal with JSON.stringfy and JSON.parse methods, those are a little bit tricky and confusing. Instead you can use the for in loop to travel the keys of your objects, for example:
if you have an object like such hierarchy
{
"index": {
"url": "/",
"path_to_layout": "views/index.ejs",
"path_to_data": [
"data/global.json",
{
"data/meta.json": "default"
}
]
},
"home": {
"url": "/home",
"path_to_layout": "views/home/index.ejs",
"path_to_data": [
"data/global.json",
{
"data/meta.json": "home"
}
]
},
"about": {
"url": "/about",
"path_to_layout": "views/default.ejs",
"path_to_data": [
"data/global.json",
{
"data/meta.json": "about"
}
]
}
}
On the EJS side you can loop yourObject like this;
<% if ( locals.yourObject) { %>
<% for(key in yourObject) { %>
<% if(yourObject.hasOwnProperty(key)) { %>
<div> <a class="pagelist" href="<%= yourObject[key]['subkey'] %>"><%= key %></a></div>
<% } %>
<% } %>
<% } %>
For this example [key] can take 'index','home' and 'about' values and subkey can be any of it's children such as 'url','path_to_layout','path_to_data'