feat: add js solution to lc problem: No.0746

Author: rain84

solution/0700-0799/0746.Min Cost Climbing Stairs/README.md

@@ -246,6 +246,19 @@ function minCostClimbingStairs(cost: number[]): number {
 }
 ```
 
+#### JavaScript
+
+```js
+function minCostClimbingStairs(cost) {
+    let a = 0,
+        b = 0;
+    for (let i = 1; i < cost.length; ++i) {
+        [a, b] = [b, Math.min(a + cost[i - 1], b + cost[i])];
+    }
+    return b;
+}
+```
+
 #### Rust
 
 ```rust

solution/0700-0799/0746.Min Cost Climbing Stairs/README_EN.md

@@ -244,6 +244,19 @@ function minCostClimbingStairs(cost: number[]): number {
 }
 ```
 
+#### JavaScript
+
+```js
+function minCostClimbingStairs(cost) {
+    let a = 0,
+        b = 0;
+    for (let i = 1; i < cost.length; ++i) {
+        [a, b] = [b, Math.min(a + cost[i - 1], b + cost[i])];
+    }
+    return b;
+}
+```
+
 #### Rust
 
 ```rust

solution/0700-0799/0746.Min Cost Climbing Stairs/Solution2.js

@@ -0,0 +1,8 @@
+function minCostClimbingStairs(cost) {
+    let a = 0,
+        b = 0;
+    for (let i = 1; i < cost.length; ++i) {
+        [a, b] = [b, Math.min(a + cost[i - 1], b + cost[i])];
+    }
+    return b;
+}