Basic JavaScript Question: Download JavaScript PDF
What is eval() in JavaScript?
Answer:
The eval() method is incredibly powerful allowing us to execute snippets of code during execution in JavaScript.
<script type="text/javascript">
var USA_Texas_Austin = "521,289";
document.write("Population is "+eval("USA_"+"Texas_"+"Austin"));
</script>
This produces
Population is 521,289
<script type="text/javascript">
var USA_Texas_Austin = "521,289";
document.write("Population is "+eval("USA_"+"Texas_"+"Austin"));
</script>
This produces
Population is 521,289
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