how to set boolean attribute in ejs

Question

In ejs file i cannot get the checkbox's value when i use checked attribute. If i remove checked i can get the value.

<% newListItems.forEach(function(item) { %>
    <form action="/delete" method="post">
      <div class="item">   
          <input type="checkbox" checked value="<%=item._id%>" name="modified" onchange="this.form.submit()" >  
        <p><%=  item.name  %></p>
      </div>
    </form>
<% }) %>


"dependencies": {
    "body-parser": "^1.18.3",
    "ejs": "^3.1.8",
    "express": "^4.16.3",
    "mongoose": "^6.8.1"
  }

I first asked my question as follows, because I thought that the error was how I set a boolean attribute, but actually the error was the boolean attribute itself. For this reason, I changed my question as above. But since helpful friends answered my first question, I didn't want to delete the first version of the question.

Initial version of my question:

I want to set checked attribute of checkbox conditionally. When i don't use checked attribute, i can get the value attribute in the post method correctly. However when i add checked attribute to checkbox, the code sets the checked property but I cannot get the value attribute of the checkbox (it becomes undefined in post method). Please can someone explain to me.

When i use completed variable as checked attribute, i cannot get the value of checkbox.

<% newListItems.forEach(function(item) { %>
          <form action="/delete" method="post">
            <div class="item">  
              <% let completed = item.done ? "checked" : "" %>
              <input type="checkbox"  value="<%=item._id%>" <%=completed%> name="modified" onchange="this.form.submit()"> 
              <p><%=  item.name  %></p>
            </div>
          </form>
<% }) %>

"dependencies": {
    "body-parser": "^1.18.3",
    "ejs": "^3.1.8",
    "express": "^4.16.3",
    "mongoose": "^6.8.1"
  }

Answer 1

You can do something like this

app.get("/" , (req , res) => {
    res.render("index" , {check : 'checked'})
})

<input type="checkbox" name="Test" <%- check %> >