cib demo: custom console

main.cpp

#include <stdio.h>

int main() {
    for(int i = 0; i < 20; ++i) {
        for(int j = 0; j < 20; ++j)
            printf("%02d ", j);
        printf("\n");
    }
}

main.html

%init-scripts%

<style>
    html,
    body {
        width: 100%;
        height: 100%;
        overflow: hidden;
    }

    div {
        position: absolute;
        left: 10px;
        right: 10px;
        top: 10px;
        bottom: 10px;
        padding: 10px;
        background-color: cyan;
        overflow: auto;
    }

    pre {
        margin: 0px;
    }
</style>

<div>
    <pre id='console'></pre>
</div>

<script>
    'use strict';
    let console = document.getElementById('console');
    emModule.print = emModule.printErr = msg => {
        console.textContent += msg + '\n';
    };
</script>