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JavaScript 2022 新特性
tryjs_error_cause2
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<!DOCTYPE html> <html> <body> <h1>JavaScript Errors</h1> <h2>The cause Property</h2> <p id="demo"></p> <script> try { try { // Simulate a JSON parse failure JSON.parse("blablablabla"); } catch(err) { // Create a new error and include the original one as the cause throw new Error("Failed to load JSON", { cause: err }); } } catch(err){ let text = err.name + ": " + err.message; document.getElementById("demo").innerHTML = text; } </script> </body> </html>