<%- include("partials/header") %>
<p> this is main page</p>
<% let cpp= 6 %>
<% for (let i=0;i<cpp;i++){ %>
<div class="card">
<li><%= cards[i].name %></li>
<li><%= cards[i].price %></li>
<li><%= cards[i].title %></li>
<li><%= cards[i].inStore %></li>
<li><%= cards[i].code %></li>
</div>
<% } %>
<div>button id="next">load more</button></div>
<%- include("partials/footer") %>
How can I update the value of cpp from 6 to 12 when the button with id="next" is clicked?
It's important to note that in order for the array cards to be populated, it should originate from the res.render statement within your JavaScript file. This is because there is no existing declaration of let cards.
res.render("ejsfile", {cards: [...]});
To address this, include the cpp integer within the same call and remove the unnecessary let cpp = 6 statement:
res.render("ejsfile", {
cards: [...],
cpp: Number(req.query.cpp) || 6 // setting a default value
});
This setup allows the initial 6 entries to be accessed at http://server/mainpage?cpp=6, and also at http://server/mainpage where '6' serves as the default value. Subsequently, the "next" button can direct users to http://server/mainpage?cpp=12.
For further information on how to utilize req.query, refer to the documentation.
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