for (i= 1; i <=filas; i++) { for(m =1; m<= i; m++) {System.out.print(i);} } System.out.println(); } }

Here's the equivalent JavaScript code for the given Java code snippet:

```javascript
for (let i = 1; i <= filas; i++) {
    for (let m = 1; m <= i; m++) {
        console.log(i);
    }
    console.log();
}
```

However, the inner loop is unnecessary in this case, as it simply prints the same value `i` multiple times. The outer loop already iterates over the values from 1 to `filas`, so we can simplify the code to:

```javascript
for (let i = 1; i <= filas; i++) {
    console.log(i);
}
```

This will print the numbers from 1 to `filas`, each on a new line.