请尝试以下代码：

const toMilliseconds = (hrs,min,sec) => (hrs*60*60+min*60+sec)*1000;

console.log(toMilliseconds(34, 26, 0)); // --> 123960000ms

这很简单。

var time = "34:26";
var timeParts = time.split(":");
console.log((+timeParts[0] * (60000 * 60)) + (+timeParts[1] * 60000));

箭头功能+ES2015的吊装变化：

// Function
const milliseconds = (h, m, s) => ((h*60*60+m*60+s)*1000);

// Usage
const result = milliseconds(24, 36, 0);

// Contextual usage
const time = "34:26";
const timeParts = time.split(":");
const result = milliseconds(timeParts[0], timeParts[1], 0);
console.log(result);

通过这种方式，您可以将其组件化或服务化