How can mermaid js be used to produce dynamic diagrams?
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Mermaid.js is a JavaScript library that can create various types of charts and diagrams. It can be used to produce dynamic diagrams by utilizing its basic syntax and adding variables to make the diagram data-driven.
Here are the steps to produce dynamic diagrams using Mermaid.js:
Step 1: Define variables and data
Define variables and data that will be used in the diagram. For example, suppose we want to create a bar chart that shows the sales data of different products. We need to define variables such as product names, sales amounts, and the color for each product.
var products = ["Product A", "Product B", "Product C", "Product D"];
var salesAmount = [50, 120, 70, 90];
var colors = ["#ff0000", "#00ff00", "#0000ff", "#ffff00"];
Step 2: Use Mermaid syntax to define the diagram
Use Mermaid syntax to define the diagram. For example, we can use the 'bar' syntax to create a bar chart.
graph TD;
bar(Product A, 50, #ff0000);
bar(Product B, 120, #00ff00);
bar(Product C, 70, #0000ff);
bar(Product D, 90, #ffff00);
Step 3: Use variable values in the diagram
Use the variable values defined in step 1 to populate the diagram. We can use a loop to iterate through the variables and add them to the diagram.
graph TD;
<% for(var i=0; i<products.length; i++) { %>
bar(<%=products[i]%>, <%=salesAmount[i]%>, <%=colors[i]%>);
<% } %>
Step 4: Display the dynamic diagram
Display the dynamic diagram on a webpage using HTML and JavaScript. Mermaid.js can be added as a script tag. Then, we can call our dynamic diagram and display it on the webpage.
<html>
<head>
<script src="https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js"></script>
<script>
mermaid.initialize({startOnLoad:true});
</script>
</head>
<body>
<div class="mermaid">
graph TD;
<% for(var i=0; i<products.length; i++) { %>
bar(<%=products[i]%>, <%=salesAmount[i]%>, <%=colors[i]%>);
<% } %>
</div>
</body>
</html>
By following these steps, we can create dynamic diagrams using Mermaid.js that update and change as the variable data changes.
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Asked: 2023-05-21 09:30:25 +0000
Seen: 7 times
Last updated: May 21 '23