1 files changed, 43 insertions, 0 deletions
diff --git a/devtools/client/jsonview/components/LiveText.js b/devtools/client/jsonview/components/LiveText.js
new file mode 100644
index 0000000000..d90c099340
--- /dev/null
+++ b/devtools/client/jsonview/components/LiveText.js
@@ -0,0 +1,43 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+define(function (require, exports, module) {
+  const { Component } = require("devtools/client/shared/vendor/react");
+  const PropTypes = require("devtools/client/shared/vendor/react-prop-types");
+  const { findDOMNode } = require("devtools/client/shared/vendor/react-dom");
+  const { pre } = require("devtools/client/shared/vendor/react-dom-factories");
+
+  /**
+   * This object represents a live DOM text node in a <pre>.
+   */
+  class LiveText extends Component {
+    static get propTypes() {
+      return {
+        data: PropTypes.instanceOf(Text),
+      };
+    }
+
+    componentDidMount() {
+      this.componentDidUpdate();
+    }
+
+    componentDidUpdate() {
+      const el = findDOMNode(this);
+      if (el.firstChild === this.props.data) {
+        return;
+      }
+      el.textContent = "";
+      el.append(this.props.data);
+    }
+
+    render() {
+      return pre({ className: "data" });
+    }
+  }
+
+  // Exports from this module
+  exports.LiveText = LiveText;
+});