Limit the scope of bootstrap styles

Question

How do I limit Bootstrap to just the scope of a div? I need to nest the Bootstrap stylesheet inside an ExtJS app for especific divs and both are clashing since they need the

Answer 1

If you want a pure JavaScript solution with no outside libraries involved, you could go this route: The general idea is to load the raw css, then parse it line by line adding in your scoped selector where necessary.

function scopeCSS(scopeSelector, rawCSS) {
  return rawCSS.split('\n').map(line => {
    var trimmedLine = line.trim()
    if (trimmedLine.startsWith('*') || trimmedLine.startsWith('/*') || trimmedLine.startsWith('@media') || trimmedLine === '' || trimmedLine.endsWith(';') || trimmedLine.endsWith('}')) {
      return line
    }
    return line.split(',').map(selector => selector.trim()).map(selector => selector === '' ? selector : `${scopeSelector} ${selector}`).join(',');
  }).join('\n')
}
const rawCSS = document.querySelector('#before').textContent // just as an example, you'd probably use a raw loader with webpack
document.querySelector('#after').textContent = scopeCSS('.bootstrap-scope', rawCSS)

#grid {
  display: grid;
  width: 100%;
  grid-template-columns: 1fr 1fr;
}

  

    
/*!
 * Bootstrap Grid v5.0.0-alpha1 (https://getbootstrap.com/)
 * Copyright 2011-2020 The Bootstrap Authors
 * Copyright 2011-2020 Twitter, Inc.
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
 */
.container,
.container-fluid,
.container-sm,
.container-md,
.container-lg,
.container-xl,
.container-xxl {
  width: 100%;
  padding-right: 1rem;
  padding-left: 1rem;
  margin-right: auto;
  margin-left: auto;
}

@media (min-width: 576px) {
  .container, .container-sm {
    max-width: 540px;
  }
}

@media (min-width: 768px) {
  .container, .container-sm, .container-md {
    max-width: 720px;
  }
}

@media (min-width: 992px) {
  .container, .container-sm, .container-md, .container-lg {
    max-width: 960px;
  }
}

@media (min-width: 1200px) {
  .container, .container-sm, .container-md, .container-lg, .container-xl {
    max-width: 1140px;
  }
}

@media (min-width: 1400px) {
  .container, .container-sm, .container-md, .container-lg, .container-xl, .container-xxl {
    max-width: 1320px;
  }
}

.row {
  --bs-gutter-x: 1.5rem;
  --bs-gutter-y: 0;
  display: flex;
  flex: 1 0 100%;
  flex-wrap: wrap;
  margin-top: calc(var(--bs-gutter-y) * -1);
  margin-right: calc(var(--bs-gutter-x) / -2);
  margin-left: calc(var(--bs-gutter-x) / -2);
}

.row > * {
  box-sizing: border-box;
  flex-shrink: 0;
  width: 100%;
  max-width: 100%;
  padding-right: calc(var(--bs-gutter-x) / 2);
  padding-left: calc(var(--bs-gutter-x) / 2);
  margin-top: var(--bs-gutter-y);
}

.col {
  flex: 1 0 0%;
}
/*# sourceMappingURL=bootstrap-grid.css.map */