docs: add Abhijeet's math-wiki to the showcase (#228)

jet457

2022-11-19 151b9851d6828ef28ed75a40e12be01e421b94d8

 assets/js/clipboard.js

@@ -25,7 +25,10 @@
                () => {
                    button.blur();
                    button.innerHTML = svgCheck;
                    setTimeout(() => (button.innerHTML = svgCopy), 2000);
                    setTimeout(() => {
                     button.innerHTML = svgCopy
                     button.style.borderColor = ""
                    }, 2000);
                },
                (error) => (button.innerHTML = "Error")
            );