Add kick sequencer

2 files changed, 42 insertions, 0 deletions

diff --git a/src/lib/h.ts b/src/lib/h.ts
new file mode 100644
index 0000000..8b1abf3
--- /dev/null
+++ b/src/lib/h.ts
@@ -0,0 +1,34 @@
+type Child = Element | Text | string | number
+
+export default function h(
+  tagName: string,
+  attrs: object,
+  ...children: Child[]
+): Element {
+  const isSvg = tagName === 'svg' || tagName === 'path'
+
+  let elem = isSvg
+    ? document.createElementNS('http://www.w3.org/2000/svg', tagName)
+    : document.createElement(tagName)
+
+  if (isSvg) {
+    Object.entries(attrs).forEach(([key, value]) => {
+      elem.setAttribute(key, value)
+    })
+  } else {
+    elem = Object.assign(elem, attrs)
+  }
+
+  for (const child of children) {
+    if (typeof child === 'number')
+      elem.append(child.toString())
+    else
+      elem.append(child)
+  }
+
+  return elem
+}
+
+export function classNames(obj: {[key: string]: boolean }): string {
+  return Object.keys(obj).filter(k => obj[k]).join(' ')
+}
diff --git a/src/lib/time.ts b/src/lib/time.ts
new file mode 100644
index 0000000..d85e935
--- /dev/null
+++ b/src/lib/time.ts
@@ -0,0 +1,8 @@
+export function debounce<A extends any[]>(f: (...args: A) => void, timeout: number): (...args: A) => void {
+  let interval: number | undefined = undefined
+
+  return (...args: A) => {
+    clearTimeout(interval)
+    interval = setTimeout(() => f.apply(this, args), timeout)
+  }
+}