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How to call a function from ruby-on-rails (HTML)?
Let I have a button
<button type="button" onclick = "myfunction()" class="collapsible">Expand content</button>
And, I have a JS function.
function collapse() {
var coll = document.getElementsByClassName("collapsible");
var i;
for (i = 0; i < coll.length; i++) {
coll[i].addEventListener("click", function() {
this.classList.toggle("active");
var content = this.nextElementSibling;
if (content.style.display === "block") {
content.style.display = "none";
} else {
content.style.display = "block";
}
});
}
}
Usually, we call a JS function in HTMl using onclick. What if it comes to Ruby-on-rails? I noticed that I can't call a function that way in Ruby-on-rails. How to call a function from ruby-on-rails (HTML)?
1 answer
Hope I understood what do you mean. I guess for example you have app.js (which contains your JavaScript function) and app.html.erb (which you want to call JavaScript function from).
OK. In your app.html.erb:
<%= javascript_include_tag('app.js') %>
<%= button_tag "Test", id: "TestBTN" %>
As you seen above, first I linked our Ruby HTML file to our nice JavaScript file then I have made a simple button and I added an ID to it (which is TestBTN) to check onclick from our JavaScript funtion.
Then in your app.js:
document.getElementById("TestBTN").addEventListener("click", function() {
console.log("Done!");
});
As seen above, I have made an EventListener for our button and onclick it will print "Done!" in the console.
Hope this helps!
More about javascript_include_tag.
More about button_tag.
2 comment threads